Home / 20,551.76-28,373.00-13,388.12

Finding the Fourth Proportional to 20,551.76, 28,373.00 and 13,388.12

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Solution

The fourth proportional to 20,551.76, 28,373.00 and 13,388.12 is: 18,483.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,551.76 : 28,373.00 = 13,388.12 : x
  2. Step 2: Convert to fraction form
    20,551.76/28,373.00 = 13,388.12/x
  3. Step 3: Cross multiply
    20,551.76x = 28,373.00 × 13,388.12
  4. Step 4: Simplify right side
    20,551.76x = 379,861,132.75
  5. Step 5: Solve for x
    x = 379,861,132.75/20,551.76
  6. Step 6: Final answer
    x = 18,483.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.