Home / 31,815.70-47,723.55-20,142.10

Finding the Fourth Proportional to 31,815.70, 47,723.55 and 20,142.10

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Solution

The fourth proportional to 31,815.70, 47,723.55 and 20,142.10 is: 30,213.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,815.70 : 47,723.55 = 20,142.10 : x
  2. Step 2: Convert to fraction form
    31,815.70/47,723.55 = 20,142.10/x
  3. Step 3: Cross multiply
    31,815.70x = 47,723.55 × 20,142.10
  4. Step 4: Simplify right side
    31,815.70x = 961,252,516.46
  5. Step 5: Solve for x
    x = 961,252,516.46/31,815.70
  6. Step 6: Final answer
    x = 30,213.15

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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.