Home / 15,330.30-21,147.15-9,655.28

Finding the Fourth Proportional to 15,330.30, 21,147.15 and 9,655.28

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Solution

The fourth proportional to 15,330.30, 21,147.15 and 9,655.28 is: 13,318.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,330.30 : 21,147.15 = 9,655.28 : x
  2. Step 2: Convert to fraction form
    15,330.30/21,147.15 = 9,655.28/x
  3. Step 3: Cross multiply
    15,330.30x = 21,147.15 × 9,655.28
  4. Step 4: Simplify right side
    15,330.30x = 204,181,707.32
  5. Step 5: Solve for x
    x = 204,181,707.32/15,330.30
  6. Step 6: Final answer
    x = 13,318.83

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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.