Home / 7,860.55-11,780.40-5,770.78

Finding the Fourth Proportional to 7,860.55, 11,780.40 and 5,770.78

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Solution

The fourth proportional to 7,860.55, 11,780.40 and 5,770.78 is: 8,648.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,860.55 : 11,780.40 = 5,770.78 : x
  2. Step 2: Convert to fraction form
    7,860.55/11,780.40 = 5,770.78/x
  3. Step 3: Cross multiply
    7,860.55x = 11,780.40 × 5,770.78
  4. Step 4: Simplify right side
    7,860.55x = 67,982,133.08
  5. Step 5: Solve for x
    x = 67,982,133.08/7,860.55
  6. Step 6: Final answer
    x = 8,648.52

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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.