Home / 15,320.72-21,132.42-9,655.58

Finding the Fourth Proportional to 15,320.72, 21,132.42 and 9,655.58

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Solution

The fourth proportional to 15,320.72, 21,132.42 and 9,655.58 is: 13,318.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,320.72 : 21,132.42 = 9,655.58 : x
  2. Step 2: Convert to fraction form
    15,320.72/21,132.42 = 9,655.58/x
  3. Step 3: Cross multiply
    15,320.72x = 21,132.42 × 9,655.58
  4. Step 4: Simplify right side
    15,320.72x = 204,045,771.90
  5. Step 5: Solve for x
    x = 204,045,771.90/15,320.72
  6. Step 6: Final answer
    x = 13,318.29

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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.