Home / 13,812.20-20,718.30-8,891.45

Finding the Fourth Proportional to 13,812.20, 20,718.30 and 8,891.45

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Solution

The fourth proportional to 13,812.20, 20,718.30 and 8,891.45 is: 13,337.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,812.20 : 20,718.30 = 8,891.45 : x
  2. Step 2: Convert to fraction form
    13,812.20/20,718.30 = 8,891.45/x
  3. Step 3: Cross multiply
    13,812.20x = 20,718.30 × 8,891.45
  4. Step 4: Simplify right side
    13,812.20x = 184,215,728.54
  5. Step 5: Solve for x
    x = 184,215,728.54/13,812.20
  6. Step 6: Final answer
    x = 13,337.18

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Similar ratio
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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.