Home / 28,220.55-38,970.71-18,166.44

Finding the Fourth Proportional to 28,220.55, 38,970.71 and 18,166.44

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Solution

The fourth proportional to 28,220.55, 38,970.71 and 18,166.44 is: 25,086.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,220.55 : 38,970.71 = 18,166.44 : x
  2. Step 2: Convert to fraction form
    28,220.55/38,970.71 = 18,166.44/x
  3. Step 3: Cross multiply
    28,220.55x = 38,970.71 × 18,166.44
  4. Step 4: Simplify right side
    28,220.55x = 707,959,064.97
  5. Step 5: Solve for x
    x = 707,959,064.97/28,220.55
  6. Step 6: Final answer
    x = 25,086.65

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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.