Home / 7,500.30-11,255.40-3,117.75

Finding the Fourth Proportional to 7,500.30, 11,255.40 and 3,117.75

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Solution

The fourth proportional to 7,500.30, 11,255.40 and 3,117.75 is: 4,678.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,500.30 : 11,255.40 = 3,117.75 : x
  2. Step 2: Convert to fraction form
    7,500.30/11,255.40 = 3,117.75/x
  3. Step 3: Cross multiply
    7,500.30x = 11,255.40 × 3,117.75
  4. Step 4: Simplify right side
    7,500.30x = 35,091,523.35
  5. Step 5: Solve for x
    x = 35,091,523.35/7,500.30
  6. Step 6: Final answer
    x = 4,678.68

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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.