Home / 20,862.36-28,790.10-11,431.08

Finding the Fourth Proportional to 20,862.36, 28,790.10 and 11,431.08

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Solution

The fourth proportional to 20,862.36, 28,790.10 and 11,431.08 is: 15,774.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,862.36 : 28,790.10 = 11,431.08 : x
  2. Step 2: Convert to fraction form
    20,862.36/28,790.10 = 11,431.08/x
  3. Step 3: Cross multiply
    20,862.36x = 28,790.10 × 11,431.08
  4. Step 4: Simplify right side
    20,862.36x = 329,101,936.31
  5. Step 5: Solve for x
    x = 329,101,936.31/20,862.36
  6. Step 6: Final answer
    x = 15,774.91

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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.