Home / 15,385.52-21,232.52-9,419.92

Finding the Fourth Proportional to 15,385.52, 21,232.52 and 9,419.92

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Solution

The fourth proportional to 15,385.52, 21,232.52 and 9,419.92 is: 12,999.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,385.52 : 21,232.52 = 9,419.92 : x
  2. Step 2: Convert to fraction form
    15,385.52/21,232.52 = 9,419.92/x
  3. Step 3: Cross multiply
    15,385.52x = 21,232.52 × 9,419.92
  4. Step 4: Simplify right side
    15,385.52x = 200,008,639.80
  5. Step 5: Solve for x
    x = 200,008,639.80/15,385.52
  6. Step 6: Final answer
    x = 12,999.80

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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.