Home / 42,438.28-63,671.23-20,248.78

Finding the Fourth Proportional to 42,438.28, 63,671.23 and 20,248.78

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Solution

The fourth proportional to 42,438.28, 63,671.23 and 20,248.78 is: 30,379.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,438.28 : 63,671.23 = 20,248.78 : x
  2. Step 2: Convert to fraction form
    42,438.28/63,671.23 = 20,248.78/x
  3. Step 3: Cross multiply
    42,438.28x = 63,671.23 × 20,248.78
  4. Step 4: Simplify right side
    42,438.28x = 1,289,264,728.60
  5. Step 5: Solve for x
    x = 1,289,264,728.60/42,438.28
  6. Step 6: Final answer
    x = 30,379.76

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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.