Home / 28,180.71-38,915.24-18,132.66

Finding the Fourth Proportional to 28,180.71, 38,915.24 and 18,132.66

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Solution

The fourth proportional to 28,180.71, 38,915.24 and 18,132.66 is: 25,039.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,180.71 : 38,915.24 = 18,132.66 : x
  2. Step 2: Convert to fraction form
    28,180.71/38,915.24 = 18,132.66/x
  3. Step 3: Cross multiply
    28,180.71x = 38,915.24 × 18,132.66
  4. Step 4: Simplify right side
    28,180.71x = 705,636,725.08
  5. Step 5: Solve for x
    x = 705,636,725.08/28,180.71
  6. Step 6: Final answer
    x = 25,039.71

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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.