Home / 15,465.28-21,342.24-8,391.76

Finding the Fourth Proportional to 15,465.28, 21,342.24 and 8,391.76

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Solution

The fourth proportional to 15,465.28, 21,342.24 and 8,391.76 is: 11,580.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,465.28 : 21,342.24 = 8,391.76 : x
  2. Step 2: Convert to fraction form
    15,465.28/21,342.24 = 8,391.76/x
  3. Step 3: Cross multiply
    15,465.28x = 21,342.24 × 8,391.76
  4. Step 4: Simplify right side
    15,465.28x = 179,098,955.94
  5. Step 5: Solve for x
    x = 179,098,955.94/15,465.28
  6. Step 6: Final answer
    x = 11,580.71

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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.