Home / 15,372.53-21,218.79-9,000.61

Finding the Fourth Proportional to 15,372.53, 21,218.79 and 9,000.61

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Solution

The fourth proportional to 15,372.53, 21,218.79 and 9,000.61 is: 12,423.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,372.53 : 21,218.79 = 9,000.61 : x
  2. Step 2: Convert to fraction form
    15,372.53/21,218.79 = 9,000.61/x
  3. Step 3: Cross multiply
    15,372.53x = 21,218.79 × 9,000.61
  4. Step 4: Simplify right side
    15,372.53x = 190,982,129.01
  5. Step 5: Solve for x
    x = 190,982,129.01/15,372.53
  6. Step 6: Final answer
    x = 12,423.60

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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.