Home / 28,560.50-42,789.72-20,118.68

Finding the Fourth Proportional to 28,560.50, 42,789.72 and 20,118.68

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Solution

The fourth proportional to 28,560.50, 42,789.72 and 20,118.68 is: 30,142.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,560.50 : 42,789.72 = 20,118.68 : x
  2. Step 2: Convert to fraction form
    28,560.50/42,789.72 = 20,118.68/x
  3. Step 3: Cross multiply
    28,560.50x = 42,789.72 × 20,118.68
  4. Step 4: Simplify right side
    28,560.50x = 860,872,683.97
  5. Step 5: Solve for x
    x = 860,872,683.97/28,560.50
  6. Step 6: Final answer
    x = 30,142.07

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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.