Home / 15,505.60-21,399.52-9,217.92

Finding the Fourth Proportional to 15,505.60, 21,399.52 and 9,217.92

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Solution

The fourth proportional to 15,505.60, 21,399.52 and 9,217.92 is: 12,721.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,505.60 : 21,399.52 = 9,217.92 : x
  2. Step 2: Convert to fraction form
    15,505.60/21,399.52 = 9,217.92/x
  3. Step 3: Cross multiply
    15,505.60x = 21,399.52 × 9,217.92
  4. Step 4: Simplify right side
    15,505.60x = 197,259,063.40
  5. Step 5: Solve for x
    x = 197,259,063.40/15,505.60
  6. Step 6: Final answer
    x = 12,721.79

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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.