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Finding the Fourth Proportional to 7,275.60, 10,040.92 and 4,089.20

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Solution

The fourth proportional to 7,275.60, 10,040.92 and 4,089.20 is: 5,643.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,275.60 : 10,040.92 = 4,089.20 : x
  2. Step 2: Convert to fraction form
    7,275.60/10,040.92 = 4,089.20/x
  3. Step 3: Cross multiply
    7,275.60x = 10,040.92 × 4,089.20
  4. Step 4: Simplify right side
    7,275.60x = 41,059,330.06
  5. Step 5: Solve for x
    x = 41,059,330.06/7,275.60
  6. Step 6: Final answer
    x = 5,643.43

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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.