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Finding the Fourth Proportional to 15,934.73, 21,989.93 and 8,861.13

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Solution

The fourth proportional to 15,934.73, 21,989.93 and 8,861.13 is: 12,228.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,934.73 : 21,989.93 = 8,861.13 : x
  2. Step 2: Convert to fraction form
    15,934.73/21,989.93 = 8,861.13/x
  3. Step 3: Cross multiply
    15,934.73x = 21,989.93 × 8,861.13
  4. Step 4: Simplify right side
    15,934.73x = 194,855,628.42
  5. Step 5: Solve for x
    x = 194,855,628.42/15,934.73
  6. Step 6: Final answer
    x = 12,228.36

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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.