Home / 20,765.20-31,172.40-16,385.68

Finding the Fourth Proportional to 20,765.20, 31,172.40 and 16,385.68

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Solution

The fourth proportional to 20,765.20, 31,172.40 and 16,385.68 is: 24,597.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,765.20 : 31,172.40 = 16,385.68 : x
  2. Step 2: Convert to fraction form
    20,765.20/31,172.40 = 16,385.68/x
  3. Step 3: Cross multiply
    20,765.20x = 31,172.40 × 16,385.68
  4. Step 4: Simplify right side
    20,765.20x = 510,780,971.23
  5. Step 5: Solve for x
    x = 510,780,971.23/20,765.20
  6. Step 6: Final answer
    x = 24,597.93

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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.