Home / 7,675.20-11,512.80-5,342.40

Finding the Fourth Proportional to 7,675.20, 11,512.80 and 5,342.40

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Solution

The fourth proportional to 7,675.20, 11,512.80 and 5,342.40 is: 8,013.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,675.20 : 11,512.80 = 5,342.40 : x
  2. Step 2: Convert to fraction form
    7,675.20/11,512.80 = 5,342.40/x
  3. Step 3: Cross multiply
    7,675.20x = 11,512.80 × 5,342.40
  4. Step 4: Simplify right side
    7,675.20x = 61,505,982.72
  5. Step 5: Solve for x
    x = 61,505,982.72/7,675.20
  6. Step 6: Final answer
    x = 8,013.60

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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.