Home / 7,340.40-10,138.20-5,458.80

Finding the Fourth Proportional to 7,340.40, 10,138.20 and 5,458.80

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Solution

The fourth proportional to 7,340.40, 10,138.20 and 5,458.80 is: 7,539.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,340.40 : 10,138.20 = 5,458.80 : x
  2. Step 2: Convert to fraction form
    7,340.40/10,138.20 = 5,458.80/x
  3. Step 3: Cross multiply
    7,340.40x = 10,138.20 × 5,458.80
  4. Step 4: Simplify right side
    7,340.40x = 55,342,406.16
  5. Step 5: Solve for x
    x = 55,342,406.16/7,340.40
  6. Step 6: Final answer
    x = 7,539.43

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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.