Home / 20,862.66-28,790.29-11,431.23

Finding the Fourth Proportional to 20,862.66, 28,790.29 and 11,431.23

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Solution

The fourth proportional to 20,862.66, 28,790.29 and 11,431.23 is: 15,774.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,862.66 : 28,790.29 = 11,431.23 : x
  2. Step 2: Convert to fraction form
    20,862.66/28,790.29 = 11,431.23/x
  3. Step 3: Cross multiply
    20,862.66x = 28,790.29 × 11,431.23
  4. Step 4: Simplify right side
    20,862.66x = 329,108,268.78
  5. Step 5: Solve for x
    x = 329,108,268.78/20,862.66
  6. Step 6: Final answer
    x = 15,774.99

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Half scale
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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.