Home / 20,731.10-31,096.63-5,148.73

Finding the Fourth Proportional to 20,731.10, 31,096.63 and 5,148.73

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Solution

The fourth proportional to 20,731.10, 31,096.63 and 5,148.73 is: 7,723.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,731.10 : 31,096.63 = 5,148.73 : x
  2. Step 2: Convert to fraction form
    20,731.10/31,096.63 = 5,148.73/x
  3. Step 3: Cross multiply
    20,731.10x = 31,096.63 × 5,148.73
  4. Step 4: Simplify right side
    20,731.10x = 160,107,970.55
  5. Step 5: Solve for x
    x = 160,107,970.55/20,731.10
  6. Step 6: Final answer
    x = 7,723.08

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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.