Home / 28,377.78-39,160.98-15,630.71

Finding the Fourth Proportional to 28,377.78, 39,160.98 and 15,630.71

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Solution

The fourth proportional to 28,377.78, 39,160.98 and 15,630.71 is: 21,570.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,377.78 : 39,160.98 = 15,630.71 : x
  2. Step 2: Convert to fraction form
    28,377.78/39,160.98 = 15,630.71/x
  3. Step 3: Cross multiply
    28,377.78x = 39,160.98 × 15,630.71
  4. Step 4: Simplify right side
    28,377.78x = 612,113,872.74
  5. Step 5: Solve for x
    x = 612,113,872.74/28,377.78
  6. Step 6: Final answer
    x = 21,570.18

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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.