Home / 15,516.28-21,412.52-8,442.71

Finding the Fourth Proportional to 15,516.28, 21,412.52 and 8,442.71

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Solution

The fourth proportional to 15,516.28, 21,412.52 and 8,442.71 is: 11,650.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,516.28 : 21,412.52 = 8,442.71 : x
  2. Step 2: Convert to fraction form
    15,516.28/21,412.52 = 8,442.71/x
  3. Step 3: Cross multiply
    15,516.28x = 21,412.52 × 8,442.71
  4. Step 4: Simplify right side
    15,516.28x = 180,779,659.41
  5. Step 5: Solve for x
    x = 180,779,659.41/15,516.28
  6. Step 6: Final answer
    x = 11,650.97

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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.