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Finding the Fourth Proportional to 42,491.76, 63,765.84 and 28,466.88

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Solution

The fourth proportional to 42,491.76, 63,765.84 and 28,466.88 is: 42,719.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,491.76 : 63,765.84 = 28,466.88 : x
  2. Step 2: Convert to fraction form
    42,491.76/63,765.84 = 28,466.88/x
  3. Step 3: Cross multiply
    42,491.76x = 63,765.84 × 28,466.88
  4. Step 4: Simplify right side
    42,491.76x = 1,815,214,515.38
  5. Step 5: Solve for x
    x = 1,815,214,515.38/42,491.76
  6. Step 6: Final answer
    x = 42,719.21

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1.5x scale

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.