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Finding the Fourth Proportional to 15,882.87, 21,917.61 and 8,809.14

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Solution

The fourth proportional to 15,882.87, 21,917.61 and 8,809.14 is: 12,156.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,882.87 : 21,917.61 = 8,809.14 : x
  2. Step 2: Convert to fraction form
    15,882.87/21,917.61 = 8,809.14/x
  3. Step 3: Cross multiply
    15,882.87x = 21,917.61 × 8,809.14
  4. Step 4: Simplify right side
    15,882.87x = 193,075,294.96
  5. Step 5: Solve for x
    x = 193,075,294.96/15,882.87
  6. Step 6: Final answer
    x = 12,156.20

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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.