Home / 28,385.36-39,180.88-18,314.08

Finding the Fourth Proportional to 28,385.36, 39,180.88 and 18,314.08

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Solution

The fourth proportional to 28,385.36, 39,180.88 and 18,314.08 is: 25,279.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,385.36 : 39,180.88 = 18,314.08 : x
  2. Step 2: Convert to fraction form
    28,385.36/39,180.88 = 18,314.08/x
  3. Step 3: Cross multiply
    28,385.36x = 39,180.88 × 18,314.08
  4. Step 4: Simplify right side
    28,385.36x = 717,561,770.79
  5. Step 5: Solve for x
    x = 717,561,770.79/28,385.36
  6. Step 6: Final answer
    x = 25,279.29

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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.