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Finding the Fourth Proportional to 7,975.80, 10,995.20 and 5,610.60

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Solution

The fourth proportional to 7,975.80, 10,995.20 and 5,610.60 is: 7,734.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,975.80 : 10,995.20 = 5,610.60 : x
  2. Step 2: Convert to fraction form
    7,975.80/10,995.20 = 5,610.60/x
  3. Step 3: Cross multiply
    7,975.80x = 10,995.20 × 5,610.60
  4. Step 4: Simplify right side
    7,975.80x = 61,689,641.07
  5. Step 5: Solve for x
    x = 61,689,641.07/7,975.80
  6. Step 6: Final answer
    x = 7,734.60

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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.