Home / 42,490.85-63,639.27-20,319.86

Finding the Fourth Proportional to 42,490.85, 63,639.27 and 20,319.86

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Solution

The fourth proportional to 42,490.85, 63,639.27 and 20,319.86 is: 30,433.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,490.85 : 63,639.27 = 20,319.86 : x
  2. Step 2: Convert to fraction form
    42,490.85/63,639.27 = 20,319.86/x
  3. Step 3: Cross multiply
    42,490.85x = 63,639.27 × 20,319.86
  4. Step 4: Simplify right side
    42,490.85x = 1,293,141,216.00
  5. Step 5: Solve for x
    x = 1,293,141,216.00/42,490.85
  6. Step 6: Final answer
    x = 30,433.41

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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.