Home / 7,921.56-10,940.40-5,280.20

Finding the Fourth Proportional to 7,921.56, 10,940.40 and 5,280.20

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Solution

The fourth proportional to 7,921.56, 10,940.40 and 5,280.20 is: 7,292.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,921.56 : 10,940.40 = 5,280.20 : x
  2. Step 2: Convert to fraction form
    7,921.56/10,940.40 = 5,280.20/x
  3. Step 3: Cross multiply
    7,921.56x = 10,940.40 × 5,280.20
  4. Step 4: Simplify right side
    7,921.56x = 57,767,500.08
  5. Step 5: Solve for x
    x = 57,767,500.08/7,921.56
  6. Step 6: Final answer
    x = 7,292.44

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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.