Home / 5,478.60-7,560.45-3,121.14

Finding the Fourth Proportional to 5,478.60, 7,560.45 and 3,121.14

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Solution

The fourth proportional to 5,478.60, 7,560.45 and 3,121.14 is: 4,307.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,478.60 : 7,560.45 = 3,121.14 : x
  2. Step 2: Convert to fraction form
    5,478.60/7,560.45 = 3,121.14/x
  3. Step 3: Cross multiply
    5,478.60x = 7,560.45 × 3,121.14
  4. Step 4: Simplify right side
    5,478.60x = 23,597,222.91
  5. Step 5: Solve for x
    x = 23,597,222.91/5,478.60
  6. Step 6: Final answer
    x = 4,307.16

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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.