Home / 5,478.91-7,560.88-3,121.07

Finding the Fourth Proportional to 5,478.91, 7,560.88 and 3,121.07

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Solution

The fourth proportional to 5,478.91, 7,560.88 and 3,121.07 is: 4,307.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,478.91 : 7,560.88 = 3,121.07 : x
  2. Step 2: Convert to fraction form
    5,478.91/7,560.88 = 3,121.07/x
  3. Step 3: Cross multiply
    5,478.91x = 7,560.88 × 3,121.07
  4. Step 4: Simplify right side
    5,478.91x = 23,597,990.13
  5. Step 5: Solve for x
    x = 23,597,990.13/5,478.91
  6. Step 6: Final answer
    x = 4,307.06

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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.