Home / 28,377.72-39,160.88-15,630.66

Finding the Fourth Proportional to 28,377.72, 39,160.88 and 15,630.66

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Solution

The fourth proportional to 28,377.72, 39,160.88 and 15,630.66 is: 21,570.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,377.72 : 39,160.88 = 15,630.66 : x
  2. Step 2: Convert to fraction form
    28,377.72/39,160.88 = 15,630.66/x
  3. Step 3: Cross multiply
    28,377.72x = 39,160.88 × 15,630.66
  4. Step 4: Simplify right side
    28,377.72x = 612,110,400.58
  5. Step 5: Solve for x
    x = 612,110,400.58/28,377.72
  6. Step 6: Final answer
    x = 21,570.11

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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.