Home / 15,312.17-21,138.78-9,655.13

Finding the Fourth Proportional to 15,312.17, 21,138.78 and 9,655.13

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Solution

The fourth proportional to 15,312.17, 21,138.78 and 9,655.13 is: 13,329.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,312.17 : 21,138.78 = 9,655.13 : x
  2. Step 2: Convert to fraction form
    15,312.17/21,138.78 = 9,655.13/x
  3. Step 3: Cross multiply
    15,312.17x = 21,138.78 × 9,655.13
  4. Step 4: Simplify right side
    15,312.17x = 204,097,668.94
  5. Step 5: Solve for x
    x = 204,097,668.94/15,312.17
  6. Step 6: Final answer
    x = 13,329.11

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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.