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Finding the Fourth Proportional to 18,307.60, 27,461.40 and 10,920.40

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Solution

The fourth proportional to 18,307.60, 27,461.40 and 10,920.40 is: 16,380.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,307.60 : 27,461.40 = 10,920.40 : x
  2. Step 2: Convert to fraction form
    18,307.60/27,461.40 = 10,920.40/x
  3. Step 3: Cross multiply
    18,307.60x = 27,461.40 × 10,920.40
  4. Step 4: Simplify right side
    18,307.60x = 299,889,472.56
  5. Step 5: Solve for x
    x = 299,889,472.56/18,307.60
  6. Step 6: Final answer
    x = 16,380.60

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.