Home / 20,560.76-28,373.28-11,485.88

Finding the Fourth Proportional to 20,560.76, 28,373.28 and 11,485.88

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Solution

The fourth proportional to 20,560.76, 28,373.28 and 11,485.88 is: 15,850.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,560.76 : 28,373.28 = 11,485.88 : x
  2. Step 2: Convert to fraction form
    20,560.76/28,373.28 = 11,485.88/x
  3. Step 3: Cross multiply
    20,560.76x = 28,373.28 × 11,485.88
  4. Step 4: Simplify right side
    20,560.76x = 325,892,089.29
  5. Step 5: Solve for x
    x = 325,892,089.29/20,560.76
  6. Step 6: Final answer
    x = 15,850.20

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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.