Home / 42,640.03-63,981.61-28,418.21

Finding the Fourth Proportional to 42,640.03, 63,981.61 and 28,418.21

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Solution

The fourth proportional to 42,640.03, 63,981.61 and 28,418.21 is: 42,641.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,640.03 : 63,981.61 = 28,418.21 : x
  2. Step 2: Convert to fraction form
    42,640.03/63,981.61 = 28,418.21/x
  3. Step 3: Cross multiply
    42,640.03x = 63,981.61 × 28,418.21
  4. Step 4: Simplify right side
    42,640.03x = 1,818,242,367.12
  5. Step 5: Solve for x
    x = 1,818,242,367.12/42,640.03
  6. Step 6: Final answer
    x = 42,641.68

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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.