Home / 20,916.39-28,866.63-11,962.15

Finding the Fourth Proportional to 20,916.39, 28,866.63 and 11,962.15

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Solution

The fourth proportional to 20,916.39, 28,866.63 and 11,962.15 is: 16,508.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,916.39 : 28,866.63 = 11,962.15 : x
  2. Step 2: Convert to fraction form
    20,916.39/28,866.63 = 11,962.15/x
  3. Step 3: Cross multiply
    20,916.39x = 28,866.63 × 11,962.15
  4. Step 4: Simplify right side
    20,916.39x = 345,306,863.46
  5. Step 5: Solve for x
    x = 345,306,863.46/20,916.39
  6. Step 6: Final answer
    x = 16,508.91

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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.