Home / 28,675.11-39,560.60-21,139.33

Finding the Fourth Proportional to 28,675.11, 39,560.60 and 21,139.33

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Solution

The fourth proportional to 28,675.11, 39,560.60 and 21,139.33 is: 29,164.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,675.11 : 39,560.60 = 21,139.33 : x
  2. Step 2: Convert to fraction form
    28,675.11/39,560.60 = 21,139.33/x
  3. Step 3: Cross multiply
    28,675.11x = 39,560.60 × 21,139.33
  4. Step 4: Simplify right side
    28,675.11x = 836,284,606.52
  5. Step 5: Solve for x
    x = 836,284,606.52/28,675.11
  6. Step 6: Final answer
    x = 29,164.13

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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.