Home / 15,459.12-21,333.42-8,385.48

Finding the Fourth Proportional to 15,459.12, 21,333.42 and 8,385.48

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Solution

The fourth proportional to 15,459.12, 21,333.42 and 8,385.48 is: 11,571.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,459.12 : 21,333.42 = 8,385.48 : x
  2. Step 2: Convert to fraction form
    15,459.12/21,333.42 = 8,385.48/x
  3. Step 3: Cross multiply
    15,459.12x = 21,333.42 × 8,385.48
  4. Step 4: Simplify right side
    15,459.12x = 178,890,966.74
  5. Step 5: Solve for x
    x = 178,890,966.74/15,459.12
  6. Step 6: Final answer
    x = 11,571.87

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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.