Home / 20,515.20-30,772.80-14,901.90

Finding the Fourth Proportional to 20,515.20, 30,772.80 and 14,901.90

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Solution

The fourth proportional to 20,515.20, 30,772.80 and 14,901.90 is: 22,352.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,515.20 : 30,772.80 = 14,901.90 : x
  2. Step 2: Convert to fraction form
    20,515.20/30,772.80 = 14,901.90/x
  3. Step 3: Cross multiply
    20,515.20x = 30,772.80 × 14,901.90
  4. Step 4: Simplify right side
    20,515.20x = 458,573,188.32
  5. Step 5: Solve for x
    x = 458,573,188.32/20,515.20
  6. Step 6: Final answer
    x = 22,352.85

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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.