Home / 5,187.25-7,780.88-1,680.20

Finding the Fourth Proportional to 5,187.25, 7,780.88 and 1,680.20

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Solution

The fourth proportional to 5,187.25, 7,780.88 and 1,680.20 is: 2,520.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,187.25 : 7,780.88 = 1,680.20 : x
  2. Step 2: Convert to fraction form
    5,187.25/7,780.88 = 1,680.20/x
  3. Step 3: Cross multiply
    5,187.25x = 7,780.88 × 1,680.20
  4. Step 4: Simplify right side
    5,187.25x = 13,073,434.58
  5. Step 5: Solve for x
    x = 13,073,434.58/5,187.25
  6. Step 6: Final answer
    x = 2,520.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.