Home / 7,125.12-9,832.86-3,981.51

Finding the Fourth Proportional to 7,125.12, 9,832.86 and 3,981.51

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Solution

The fourth proportional to 7,125.12, 9,832.86 and 3,981.51 is: 5,494.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,125.12 : 9,832.86 = 3,981.51 : x
  2. Step 2: Convert to fraction form
    7,125.12/9,832.86 = 3,981.51/x
  3. Step 3: Cross multiply
    7,125.12x = 9,832.86 × 3,981.51
  4. Step 4: Simplify right side
    7,125.12x = 39,149,630.42
  5. Step 5: Solve for x
    x = 39,149,630.42/7,125.12
  6. Step 6: Final answer
    x = 5,494.59

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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.