Home / 20,645.13-30,972.03-10,781.76

Finding the Fourth Proportional to 20,645.13, 30,972.03 and 10,781.76

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Solution

The fourth proportional to 20,645.13, 30,972.03 and 10,781.76 is: 16,174.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,645.13 : 30,972.03 = 10,781.76 : x
  2. Step 2: Convert to fraction form
    20,645.13/30,972.03 = 10,781.76/x
  3. Step 3: Cross multiply
    20,645.13x = 30,972.03 × 10,781.76
  4. Step 4: Simplify right side
    20,645.13x = 333,932,994.17
  5. Step 5: Solve for x
    x = 333,932,994.17/20,645.13
  6. Step 6: Final answer
    x = 16,174.90

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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.