Home / 26,280.12-39,351.18-20,990.76

Finding the Fourth Proportional to 26,280.12, 39,351.18 and 20,990.76

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Solution

The fourth proportional to 26,280.12, 39,351.18 and 20,990.76 is: 31,431.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,280.12 : 39,351.18 = 20,990.76 : x
  2. Step 2: Convert to fraction form
    26,280.12/39,351.18 = 20,990.76/x
  3. Step 3: Cross multiply
    26,280.12x = 39,351.18 × 20,990.76
  4. Step 4: Simplify right side
    26,280.12x = 826,011,175.10
  5. Step 5: Solve for x
    x = 826,011,175.10/26,280.12
  6. Step 6: Final answer
    x = 31,431.03

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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.