Home / 28,389.44-39,177.42-15,642.80

Finding the Fourth Proportional to 28,389.44, 39,177.42 and 15,642.80

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Solution

The fourth proportional to 28,389.44, 39,177.42 and 15,642.80 is: 21,587.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,389.44 : 39,177.42 = 15,642.80 : x
  2. Step 2: Convert to fraction form
    28,389.44/39,177.42 = 15,642.80/x
  3. Step 3: Cross multiply
    28,389.44x = 39,177.42 × 15,642.80
  4. Step 4: Simplify right side
    28,389.44x = 612,844,545.58
  5. Step 5: Solve for x
    x = 612,844,545.58/28,389.44
  6. Step 6: Final answer
    x = 21,587.06

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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.