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Finding the Fourth Proportional to 7,188.71, 9,920.39 and 4,044.89

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Solution

The fourth proportional to 7,188.71, 9,920.39 and 4,044.89 is: 5,581.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,188.71 : 9,920.39 = 4,044.89 : x
  2. Step 2: Convert to fraction form
    7,188.71/9,920.39 = 4,044.89/x
  3. Step 3: Cross multiply
    7,188.71x = 9,920.39 × 4,044.89
  4. Step 4: Simplify right side
    7,188.71x = 40,126,938.68
  5. Step 5: Solve for x
    x = 40,126,938.68/7,188.71
  6. Step 6: Final answer
    x = 5,581.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.