Home / 20,342.28-28,074.72-12,389.16

Finding the Fourth Proportional to 20,342.28, 28,074.72 and 12,389.16

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Solution

The fourth proportional to 20,342.28, 28,074.72 and 12,389.16 is: 17,098.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,342.28 : 28,074.72 = 12,389.16 : x
  2. Step 2: Convert to fraction form
    20,342.28/28,074.72 = 12,389.16/x
  3. Step 3: Cross multiply
    20,342.28x = 28,074.72 × 12,389.16
  4. Step 4: Simplify right side
    20,342.28x = 347,822,198.04
  5. Step 5: Solve for x
    x = 347,822,198.04/20,342.28
  6. Step 6: Final answer
    x = 17,098.49

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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.