Home / 15,459.28-21,333.84-8,385.76

Finding the Fourth Proportional to 15,459.28, 21,333.84 and 8,385.76

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Solution

The fourth proportional to 15,459.28, 21,333.84 and 8,385.76 is: 11,572.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,459.28 : 21,333.84 = 8,385.76 : x
  2. Step 2: Convert to fraction form
    15,459.28/21,333.84 = 8,385.76/x
  3. Step 3: Cross multiply
    15,459.28x = 21,333.84 × 8,385.76
  4. Step 4: Simplify right side
    15,459.28x = 178,900,462.12
  5. Step 5: Solve for x
    x = 178,900,462.12/15,459.28
  6. Step 6: Final answer
    x = 11,572.37

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Double scale
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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.