Home / 42,480.08-63,721.74-21,679.28

Finding the Fourth Proportional to 42,480.08, 63,721.74 and 21,679.28

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Solution

The fourth proportional to 42,480.08, 63,721.74 and 21,679.28 is: 32,519.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,480.08 : 63,721.74 = 21,679.28 : x
  2. Step 2: Convert to fraction form
    42,480.08/63,721.74 = 21,679.28/x
  3. Step 3: Cross multiply
    42,480.08x = 63,721.74 × 21,679.28
  4. Step 4: Simplify right side
    42,480.08x = 1,381,441,443.55
  5. Step 5: Solve for x
    x = 1,381,441,443.55/42,480.08
  6. Step 6: Final answer
    x = 32,519.75

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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.