Home / 42,276.80-63,385.16-21,201.64

Finding the Fourth Proportional to 42,276.80, 63,385.16 and 21,201.64

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Solution

The fourth proportional to 42,276.80, 63,385.16 and 21,201.64 is: 31,787.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,276.80 : 63,385.16 = 21,201.64 : x
  2. Step 2: Convert to fraction form
    42,276.80/63,385.16 = 21,201.64/x
  3. Step 3: Cross multiply
    42,276.80x = 63,385.16 × 21,201.64
  4. Step 4: Simplify right side
    42,276.80x = 1,343,869,343.66
  5. Step 5: Solve for x
    x = 1,343,869,343.66/42,276.80
  6. Step 6: Final answer
    x = 31,787.40

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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.