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Finding the Fourth Proportional to 15,892.30, 21,932.42 and 9,178.21

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Solution

The fourth proportional to 15,892.30, 21,932.42 and 9,178.21 is: 12,666.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,892.30 : 21,932.42 = 9,178.21 : x
  2. Step 2: Convert to fraction form
    15,892.30/21,932.42 = 9,178.21/x
  3. Step 3: Cross multiply
    15,892.30x = 21,932.42 × 9,178.21
  4. Step 4: Simplify right side
    15,892.30x = 201,300,356.57
  5. Step 5: Solve for x
    x = 201,300,356.57/15,892.30
  6. Step 6: Final answer
    x = 12,666.53

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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.