Home / 20,916.77-28,867.19-11,965.59

Finding the Fourth Proportional to 20,916.77, 28,867.19 and 11,965.59

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Solution

The fourth proportional to 20,916.77, 28,867.19 and 11,965.59 is: 16,513.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,916.77 : 28,867.19 = 11,965.59 : x
  2. Step 2: Convert to fraction form
    20,916.77/28,867.19 = 11,965.59/x
  3. Step 3: Cross multiply
    20,916.77x = 28,867.19 × 11,965.59
  4. Step 4: Simplify right side
    20,916.77x = 345,412,900.16
  5. Step 5: Solve for x
    x = 345,412,900.16/20,916.77
  6. Step 6: Final answer
    x = 16,513.69

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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.