Home / 42,778.47-64,180-21,717.66

Finding the Fourth Proportional to 42,778.47, 64,180 and 21,717.66

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Solution

The fourth proportional to 42,778.47, 64,180 and 21,717.66 is: 32,582.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,778.47 : 64,180 = 21,717.66 : x
  2. Step 2: Convert to fraction form
    42,778.47/64,180 = 21,717.66/x
  3. Step 3: Cross multiply
    42,778.47x = 64,180 × 21,717.66
  4. Step 4: Simplify right side
    42,778.47x = 1,393,839,418.80
  5. Step 5: Solve for x
    x = 1,393,839,418.80/42,778.47
  6. Step 6: Final answer
    x = 32,582.73

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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.