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Finding the Fourth Proportional to 15,000.10, 20,701.02 and 8,628.76

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Solution

The fourth proportional to 15,000.10, 20,701.02 and 8,628.76 is: 11,908.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,000.10 : 20,701.02 = 8,628.76 : x
  2. Step 2: Convert to fraction form
    15,000.10/20,701.02 = 8,628.76/x
  3. Step 3: Cross multiply
    15,000.10x = 20,701.02 × 8,628.76
  4. Step 4: Simplify right side
    15,000.10x = 178,624,133.34
  5. Step 5: Solve for x
    x = 178,624,133.34/15,000.10
  6. Step 6: Final answer
    x = 11,908.20

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Half scale
Find fourth proportional to 30,000.20, 41,402.04 and 17,257.52
Double scale
Find fourth proportional to 15,001.10, 20,702.40 and 8,629.76
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.