Home / 10,881.28-15,016.32-6,688

Finding the Fourth Proportional to 10,881.28, 15,016.32 and 6,688

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Solution

The fourth proportional to 10,881.28, 15,016.32 and 6,688 is: 9,229.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,881.28 : 15,016.32 = 6,688 : x
  2. Step 2: Convert to fraction form
    10,881.28/15,016.32 = 6,688/x
  3. Step 3: Cross multiply
    10,881.28x = 15,016.32 × 6,688
  4. Step 4: Simplify right side
    10,881.28x = 100,429,148.16
  5. Step 5: Solve for x
    x = 100,429,148.16/10,881.28
  6. Step 6: Final answer
    x = 9,229.53

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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.