Home / 15,586.52-21,508.12-8,781.11

Finding the Fourth Proportional to 15,586.52, 21,508.12 and 8,781.11

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Solution

The fourth proportional to 15,586.52, 21,508.12 and 8,781.11 is: 12,117.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,586.52 : 21,508.12 = 8,781.11 : x
  2. Step 2: Convert to fraction form
    15,586.52/21,508.12 = 8,781.11/x
  3. Step 3: Cross multiply
    15,586.52x = 21,508.12 × 8,781.11
  4. Step 4: Simplify right side
    15,586.52x = 188,865,038.12
  5. Step 5: Solve for x
    x = 188,865,038.12/15,586.52
  6. Step 6: Final answer
    x = 12,117.20

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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.