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Finding the Fourth Proportional to 9,788.59, 13,508.13 and 5,312.50

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Solution

The fourth proportional to 9,788.59, 13,508.13 and 5,312.50 is: 7,331.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,788.59 : 13,508.13 = 5,312.50 : x
  2. Step 2: Convert to fraction form
    9,788.59/13,508.13 = 5,312.50/x
  3. Step 3: Cross multiply
    9,788.59x = 13,508.13 × 5,312.50
  4. Step 4: Simplify right side
    9,788.59x = 71,761,957.94
  5. Step 5: Solve for x
    x = 71,761,957.94/9,788.59
  6. Step 6: Final answer
    x = 7,331.19

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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.