Home / 28,191.87-42,287.75-12,393.12

Finding the Fourth Proportional to 28,191.87, 42,287.75 and 12,393.12

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Solution

The fourth proportional to 28,191.87, 42,287.75 and 12,393.12 is: 18,589.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,191.87 : 42,287.75 = 12,393.12 : x
  2. Step 2: Convert to fraction form
    28,191.87/42,287.75 = 12,393.12/x
  3. Step 3: Cross multiply
    28,191.87x = 42,287.75 × 12,393.12
  4. Step 4: Simplify right side
    28,191.87x = 524,077,160.28
  5. Step 5: Solve for x
    x = 524,077,160.28/28,191.87
  6. Step 6: Final answer
    x = 18,589.66

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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.