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Finding the Fourth Proportional to 18,871.70, 28,307.96 and 6,863.45

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Solution

The fourth proportional to 18,871.70, 28,307.96 and 6,863.45 is: 10,295.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,871.70 : 28,307.96 = 6,863.45 : x
  2. Step 2: Convert to fraction form
    18,871.70/28,307.96 = 6,863.45/x
  3. Step 3: Cross multiply
    18,871.70x = 28,307.96 × 6,863.45
  4. Step 4: Simplify right side
    18,871.70x = 194,290,233.74
  5. Step 5: Solve for x
    x = 194,290,233.74/18,871.70
  6. Step 6: Final answer
    x = 10,295.32

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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.