Home / 15,515.14-21,411.12-9,543.28

Finding the Fourth Proportional to 15,515.14, 21,411.12 and 9,543.28

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Solution

The fourth proportional to 15,515.14, 21,411.12 and 9,543.28 is: 13,169.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,515.14 : 21,411.12 = 9,543.28 : x
  2. Step 2: Convert to fraction form
    15,515.14/21,411.12 = 9,543.28/x
  3. Step 3: Cross multiply
    15,515.14x = 21,411.12 × 9,543.28
  4. Step 4: Simplify right side
    15,515.14x = 204,332,313.27
  5. Step 5: Solve for x
    x = 204,332,313.27/15,515.14
  6. Step 6: Final answer
    x = 13,169.87

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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.