Home / 20,839.96-31,254.18-9,150.28

Finding the Fourth Proportional to 20,839.96, 31,254.18 and 9,150.28

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Solution

The fourth proportional to 20,839.96, 31,254.18 and 9,150.28 is: 13,722.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,839.96 : 31,254.18 = 9,150.28 : x
  2. Step 2: Convert to fraction form
    20,839.96/31,254.18 = 9,150.28/x
  3. Step 3: Cross multiply
    20,839.96x = 31,254.18 × 9,150.28
  4. Step 4: Simplify right side
    20,839.96x = 285,984,498.17
  5. Step 5: Solve for x
    x = 285,984,498.17/20,839.96
  6. Step 6: Final answer
    x = 13,722.89

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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.