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Finding the Fourth Proportional to 10,881.76, 15,016.90 and 5,913.76

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Solution

The fourth proportional to 10,881.76, 15,016.90 and 5,913.76 is: 8,161.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,881.76 : 15,016.90 = 5,913.76 : x
  2. Step 2: Convert to fraction form
    10,881.76/15,016.90 = 5,913.76/x
  3. Step 3: Cross multiply
    10,881.76x = 15,016.90 × 5,913.76
  4. Step 4: Simplify right side
    10,881.76x = 88,806,342.54
  5. Step 5: Solve for x
    x = 88,806,342.54/10,881.76
  6. Step 6: Final answer
    x = 8,161.03

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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.