Home / 28,387.06-39,177.23-15,641.56

Finding the Fourth Proportional to 28,387.06, 39,177.23 and 15,641.56

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Solution

The fourth proportional to 28,387.06, 39,177.23 and 15,641.56 is: 21,587.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,387.06 : 39,177.23 = 15,641.56 : x
  2. Step 2: Convert to fraction form
    28,387.06/39,177.23 = 15,641.56/x
  3. Step 3: Cross multiply
    28,387.06x = 39,177.23 × 15,641.56
  4. Step 4: Simplify right side
    28,387.06x = 612,792,993.68
  5. Step 5: Solve for x
    x = 612,792,993.68/28,387.06
  6. Step 6: Final answer
    x = 21,587.05

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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.