Home / 7,639.20-11,458.80-5,306.40

Finding the Fourth Proportional to 7,639.20, 11,458.80 and 5,306.40

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Solution

The fourth proportional to 7,639.20, 11,458.80 and 5,306.40 is: 7,959.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,639.20 : 11,458.80 = 5,306.40 : x
  2. Step 2: Convert to fraction form
    7,639.20/11,458.80 = 5,306.40/x
  3. Step 3: Cross multiply
    7,639.20x = 11,458.80 × 5,306.40
  4. Step 4: Simplify right side
    7,639.20x = 60,804,976.32
  5. Step 5: Solve for x
    x = 60,804,976.32/7,639.20
  6. Step 6: Final answer
    x = 7,959.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.