Home / 15,853.28-21,877.52-8,779.73

Finding the Fourth Proportional to 15,853.28, 21,877.52 and 8,779.73

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Solution

The fourth proportional to 15,853.28, 21,877.52 and 8,779.73 is: 12,116.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,853.28 : 21,877.52 = 8,779.73 : x
  2. Step 2: Convert to fraction form
    15,853.28/21,877.52 = 8,779.73/x
  3. Step 3: Cross multiply
    15,853.28x = 21,877.52 × 8,779.73
  4. Step 4: Simplify right side
    15,853.28x = 192,078,565.38
  5. Step 5: Solve for x
    x = 192,078,565.38/15,853.28
  6. Step 6: Final answer
    x = 12,116.02

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Half scale
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Double scale
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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.