Home / 8,780.06-12,114.14-5,378.88

Finding the Fourth Proportional to 8,780.06, 12,114.14 and 5,378.88

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Solution

The fourth proportional to 8,780.06, 12,114.14 and 5,378.88 is: 7,421.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,780.06 : 12,114.14 = 5,378.88 : x
  2. Step 2: Convert to fraction form
    8,780.06/12,114.14 = 5,378.88/x
  3. Step 3: Cross multiply
    8,780.06x = 12,114.14 × 5,378.88
  4. Step 4: Simplify right side
    8,780.06x = 65,160,505.36
  5. Step 5: Solve for x
    x = 65,160,505.36/8,780.06
  6. Step 6: Final answer
    x = 7,421.42

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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.