Home / 20,919.84-31,373.10-6,876.60

Finding the Fourth Proportional to 20,919.84, 31,373.10 and 6,876.60

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Solution

The fourth proportional to 20,919.84, 31,373.10 and 6,876.60 is: 10,312.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,919.84 : 31,373.10 = 6,876.60 : x
  2. Step 2: Convert to fraction form
    20,919.84/31,373.10 = 6,876.60/x
  3. Step 3: Cross multiply
    20,919.84x = 31,373.10 × 6,876.60
  4. Step 4: Simplify right side
    20,919.84x = 215,740,259.46
  5. Step 5: Solve for x
    x = 215,740,259.46/20,919.84
  6. Step 6: Final answer
    x = 10,312.71

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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.