Home / 20,731.15-31,099.80-6,686.56

Finding the Fourth Proportional to 20,731.15, 31,099.80 and 6,686.56

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Solution

The fourth proportional to 20,731.15, 31,099.80 and 6,686.56 is: 10,030.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,731.15 : 31,099.80 = 6,686.56 : x
  2. Step 2: Convert to fraction form
    20,731.15/31,099.80 = 6,686.56/x
  3. Step 3: Cross multiply
    20,731.15x = 31,099.80 × 6,686.56
  4. Step 4: Simplify right side
    20,731.15x = 207,950,678.69
  5. Step 5: Solve for x
    x = 207,950,678.69/20,731.15
  6. Step 6: Final answer
    x = 10,030.83

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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.