Home / 20,969.32-31,451.74-13,154.92

Finding the Fourth Proportional to 20,969.32, 31,451.74 and 13,154.92

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Solution

The fourth proportional to 20,969.32, 31,451.74 and 13,154.92 is: 19,730.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,969.32 : 31,451.74 = 13,154.92 : x
  2. Step 2: Convert to fraction form
    20,969.32/31,451.74 = 13,154.92/x
  3. Step 3: Cross multiply
    20,969.32x = 31,451.74 × 13,154.92
  4. Step 4: Simplify right side
    20,969.32x = 413,745,123.56
  5. Step 5: Solve for x
    x = 413,745,123.56/20,969.32
  6. Step 6: Final answer
    x = 19,730.97

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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.