Home / 20,272.60-30,399.18-10,406.80

Finding the Fourth Proportional to 20,272.60, 30,399.18 and 10,406.80

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Solution

The fourth proportional to 20,272.60, 30,399.18 and 10,406.80 is: 15,605.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,272.60 : 30,399.18 = 10,406.80 : x
  2. Step 2: Convert to fraction form
    20,272.60/30,399.18 = 10,406.80/x
  3. Step 3: Cross multiply
    20,272.60x = 30,399.18 × 10,406.80
  4. Step 4: Simplify right side
    20,272.60x = 316,358,186.42
  5. Step 5: Solve for x
    x = 316,358,186.42/20,272.60
  6. Step 6: Final answer
    x = 15,605.21

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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.