Home / 20,747.84-31,121.80-5,165.48

Finding the Fourth Proportional to 20,747.84, 31,121.80 and 5,165.48

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Solution

The fourth proportional to 20,747.84, 31,121.80 and 5,165.48 is: 7,748.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,747.84 : 31,121.80 = 5,165.48 : x
  2. Step 2: Convert to fraction form
    20,747.84/31,121.80 = 5,165.48/x
  3. Step 3: Cross multiply
    20,747.84x = 31,121.80 × 5,165.48
  4. Step 4: Simplify right side
    20,747.84x = 160,759,035.46
  5. Step 5: Solve for x
    x = 160,759,035.46/20,747.84
  6. Step 6: Final answer
    x = 7,748.23

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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.