Home / 20,960.40-31,438.08-5,376.96

Finding the Fourth Proportional to 20,960.40, 31,438.08 and 5,376.96

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Solution

The fourth proportional to 20,960.40, 31,438.08 and 5,376.96 is: 8,064.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,960.40 : 31,438.08 = 5,376.96 : x
  2. Step 2: Convert to fraction form
    20,960.40/31,438.08 = 5,376.96/x
  3. Step 3: Cross multiply
    20,960.40x = 31,438.08 × 5,376.96
  4. Step 4: Simplify right side
    20,960.40x = 169,041,298.64
  5. Step 5: Solve for x
    x = 169,041,298.64/20,960.40
  6. Step 6: Final answer
    x = 8,064.79

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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.