Home / 42,780.55-64,117.36-20,587.97

Finding the Fourth Proportional to 42,780.55, 64,117.36 and 20,587.97

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Solution

The fourth proportional to 42,780.55, 64,117.36 and 20,587.97 is: 30,856.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,780.55 : 64,117.36 = 20,587.97 : x
  2. Step 2: Convert to fraction form
    42,780.55/64,117.36 = 20,587.97/x
  3. Step 3: Cross multiply
    42,780.55x = 64,117.36 × 20,587.97
  4. Step 4: Simplify right side
    42,780.55x = 1,320,045,860.63
  5. Step 5: Solve for x
    x = 1,320,045,860.63/42,780.55
  6. Step 6: Final answer
    x = 30,856.22

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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.