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Finding the Fourth Proportional to 15,842.14, 21,862.72 and 8,672.56

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Solution

The fourth proportional to 15,842.14, 21,862.72 and 8,672.56 is: 11,968.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,842.14 : 21,862.72 = 8,672.56 : x
  2. Step 2: Convert to fraction form
    15,842.14/21,862.72 = 8,672.56/x
  3. Step 3: Cross multiply
    15,842.14x = 21,862.72 × 8,672.56
  4. Step 4: Simplify right side
    15,842.14x = 189,605,750.96
  5. Step 5: Solve for x
    x = 189,605,750.96/15,842.14
  6. Step 6: Final answer
    x = 11,968.44

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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.