Home / 21,325-31,987.50-5,742.63

Finding the Fourth Proportional to 21,325, 31,987.50 and 5,742.63

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Solution

The fourth proportional to 21,325, 31,987.50 and 5,742.63 is: 8,613.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,325 : 31,987.50 = 5,742.63 : x
  2. Step 2: Convert to fraction form
    21,325/31,987.50 = 5,742.63/x
  3. Step 3: Cross multiply
    21,325x = 31,987.50 × 5,742.63
  4. Step 4: Simplify right side
    21,325x = 183,692,377.13
  5. Step 5: Solve for x
    x = 183,692,377.13/21,325
  6. Step 6: Final answer
    x = 8,613.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.