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Finding the Fourth Proportional to 19,310.20, 28,932.90 and 9,428.20

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Solution

The fourth proportional to 19,310.20, 28,932.90 and 9,428.20 is: 14,126.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,310.20 : 28,932.90 = 9,428.20 : x
  2. Step 2: Convert to fraction form
    19,310.20/28,932.90 = 9,428.20/x
  3. Step 3: Cross multiply
    19,310.20x = 28,932.90 × 9,428.20
  4. Step 4: Simplify right side
    19,310.20x = 272,785,167.78
  5. Step 5: Solve for x
    x = 272,785,167.78/19,310.20
  6. Step 6: Final answer
    x = 14,126.48

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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.