Home / 20,287.13-30,430.28-9,191.75

Finding the Fourth Proportional to 20,287.13, 30,430.28 and 9,191.75

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Solution

The fourth proportional to 20,287.13, 30,430.28 and 9,191.75 is: 13,787.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,287.13 : 30,430.28 = 9,191.75 : x
  2. Step 2: Convert to fraction form
    20,287.13/30,430.28 = 9,191.75/x
  3. Step 3: Cross multiply
    20,287.13x = 30,430.28 × 9,191.75
  4. Step 4: Simplify right side
    20,287.13x = 279,707,397.02
  5. Step 5: Solve for x
    x = 279,707,397.02/20,287.13
  6. Step 6: Final answer
    x = 13,787.43

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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.