Home / 13,489.20-20,233.80-7,657.20

Finding the Fourth Proportional to 13,489.20, 20,233.80 and 7,657.20

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Solution

The fourth proportional to 13,489.20, 20,233.80 and 7,657.20 is: 11,485.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,489.20 : 20,233.80 = 7,657.20 : x
  2. Step 2: Convert to fraction form
    13,489.20/20,233.80 = 7,657.20/x
  3. Step 3: Cross multiply
    13,489.20x = 20,233.80 × 7,657.20
  4. Step 4: Simplify right side
    13,489.20x = 154,934,253.36
  5. Step 5: Solve for x
    x = 154,934,253.36/13,489.20
  6. Step 6: Final answer
    x = 11,485.80

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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.