Home / 20,311.60-30,443.10-10,445.80

Finding the Fourth Proportional to 20,311.60, 30,443.10 and 10,445.80

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Solution

The fourth proportional to 20,311.60, 30,443.10 and 10,445.80 is: 15,656.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,311.60 : 30,443.10 = 10,445.80 : x
  2. Step 2: Convert to fraction form
    20,311.60/30,443.10 = 10,445.80/x
  3. Step 3: Cross multiply
    20,311.60x = 30,443.10 × 10,445.80
  4. Step 4: Simplify right side
    20,311.60x = 318,002,533.98
  5. Step 5: Solve for x
    x = 318,002,533.98/20,311.60
  6. Step 6: Final answer
    x = 15,656.20

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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.