Home / 15,871.29-21,902.61-8,701.88

Finding the Fourth Proportional to 15,871.29, 21,902.61 and 8,701.88

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Solution

The fourth proportional to 15,871.29, 21,902.61 and 8,701.88 is: 12,008.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,871.29 : 21,902.61 = 8,701.88 : x
  2. Step 2: Convert to fraction form
    15,871.29/21,902.61 = 8,701.88/x
  3. Step 3: Cross multiply
    15,871.29x = 21,902.61 × 8,701.88
  4. Step 4: Simplify right side
    15,871.29x = 190,593,840.40
  5. Step 5: Solve for x
    x = 190,593,840.40/15,871.29
  6. Step 6: Final answer
    x = 12,008.72

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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.