Home / 20,186.60-30,279.90-10,345.10

Finding the Fourth Proportional to 20,186.60, 30,279.90 and 10,345.10

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Solution

The fourth proportional to 20,186.60, 30,279.90 and 10,345.10 is: 15,517.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,186.60 : 30,279.90 = 10,345.10 : x
  2. Step 2: Convert to fraction form
    20,186.60/30,279.90 = 10,345.10/x
  3. Step 3: Cross multiply
    20,186.60x = 30,279.90 × 10,345.10
  4. Step 4: Simplify right side
    20,186.60x = 313,248,593.49
  5. Step 5: Solve for x
    x = 313,248,593.49/20,186.60
  6. Step 6: Final answer
    x = 15,517.65

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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.