Home / 12,688.65-17,508.02-7,385.18

Finding the Fourth Proportional to 12,688.65, 17,508.02 and 7,385.18

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Solution

The fourth proportional to 12,688.65, 17,508.02 and 7,385.18 is: 10,190.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,688.65 : 17,508.02 = 7,385.18 : x
  2. Step 2: Convert to fraction form
    12,688.65/17,508.02 = 7,385.18/x
  3. Step 3: Cross multiply
    12,688.65x = 17,508.02 × 7,385.18
  4. Step 4: Simplify right side
    12,688.65x = 129,299,754.68
  5. Step 5: Solve for x
    x = 129,299,754.68/12,688.65
  6. Step 6: Final answer
    x = 10,190.19

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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.