Home / 20,520.47-28,318.41-11,568.17

Finding the Fourth Proportional to 20,520.47, 28,318.41 and 11,568.17

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Solution

The fourth proportional to 20,520.47, 28,318.41 and 11,568.17 is: 15,964.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,520.47 : 28,318.41 = 11,568.17 : x
  2. Step 2: Convert to fraction form
    20,520.47/28,318.41 = 11,568.17/x
  3. Step 3: Cross multiply
    20,520.47x = 28,318.41 × 11,568.17
  4. Step 4: Simplify right side
    20,520.47x = 327,592,039.42
  5. Step 5: Solve for x
    x = 327,592,039.42/20,520.47
  6. Step 6: Final answer
    x = 15,964.16

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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.