Home / 5,478.78-7,560.81-3,120.96

Finding the Fourth Proportional to 5,478.78, 7,560.81 and 3,120.96

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Solution

The fourth proportional to 5,478.78, 7,560.81 and 3,120.96 is: 4,306.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,478.78 : 7,560.81 = 3,120.96 : x
  2. Step 2: Convert to fraction form
    5,478.78/7,560.81 = 3,120.96/x
  3. Step 3: Cross multiply
    5,478.78x = 7,560.81 × 3,120.96
  4. Step 4: Simplify right side
    5,478.78x = 23,596,985.58
  5. Step 5: Solve for x
    x = 23,596,985.58/5,478.78
  6. Step 6: Final answer
    x = 4,306.98

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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.