Home / 28,499.20-42,770.40-18,635.20

Finding the Fourth Proportional to 28,499.20, 42,770.40 and 18,635.20

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Solution

The fourth proportional to 28,499.20, 42,770.40 and 18,635.20 is: 27,966.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,499.20 : 42,770.40 = 18,635.20 : x
  2. Step 2: Convert to fraction form
    28,499.20/42,770.40 = 18,635.20/x
  3. Step 3: Cross multiply
    28,499.20x = 42,770.40 × 18,635.20
  4. Step 4: Simplify right side
    28,499.20x = 797,034,958.08
  5. Step 5: Solve for x
    x = 797,034,958.08/28,499.20
  6. Step 6: Final answer
    x = 27,966.92

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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.