Home / 11,915.66-16,428.47-8,516.76

Finding the Fourth Proportional to 11,915.66, 16,428.47 and 8,516.76

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Solution

The fourth proportional to 11,915.66, 16,428.47 and 8,516.76 is: 11,742.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,915.66 : 16,428.47 = 8,516.76 : x
  2. Step 2: Convert to fraction form
    11,915.66/16,428.47 = 8,516.76/x
  3. Step 3: Cross multiply
    11,915.66x = 16,428.47 × 8,516.76
  4. Step 4: Simplify right side
    11,915.66x = 139,917,293.57
  5. Step 5: Solve for x
    x = 139,917,293.57/11,915.66
  6. Step 6: Final answer
    x = 11,742.31

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Double scale
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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.