Home / 42,755.95-64,147.76-20,566.43

Finding the Fourth Proportional to 42,755.95, 64,147.76 and 20,566.43

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Solution

The fourth proportional to 42,755.95, 64,147.76 and 20,566.43 is: 30,856.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,755.95 : 64,147.76 = 20,566.43 : x
  2. Step 2: Convert to fraction form
    42,755.95/64,147.76 = 20,566.43/x
  3. Step 3: Cross multiply
    42,755.95x = 64,147.76 × 20,566.43
  4. Step 4: Simplify right side
    42,755.95x = 1,319,290,415.70
  5. Step 5: Solve for x
    x = 1,319,290,415.70/42,755.95
  6. Step 6: Final answer
    x = 30,856.30

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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.