Home / 20,923.74-31,377.69-8,439.48

Finding the Fourth Proportional to 20,923.74, 31,377.69 and 8,439.48

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Solution

The fourth proportional to 20,923.74, 31,377.69 and 8,439.48 is: 12,656.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,923.74 : 31,377.69 = 8,439.48 : x
  2. Step 2: Convert to fraction form
    20,923.74/31,377.69 = 8,439.48/x
  3. Step 3: Cross multiply
    20,923.74x = 31,377.69 × 8,439.48
  4. Step 4: Simplify right side
    20,923.74x = 264,811,387.20
  5. Step 5: Solve for x
    x = 264,811,387.20/20,923.74
  6. Step 6: Final answer
    x = 12,656.03

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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.