Home / 5,108.32-7,660.86-1,988.12

Finding the Fourth Proportional to 5,108.32, 7,660.86 and 1,988.12

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Solution

The fourth proportional to 5,108.32, 7,660.86 and 1,988.12 is: 2,981.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,108.32 : 7,660.86 = 1,988.12 : x
  2. Step 2: Convert to fraction form
    5,108.32/7,660.86 = 1,988.12/x
  3. Step 3: Cross multiply
    5,108.32x = 7,660.86 × 1,988.12
  4. Step 4: Simplify right side
    5,108.32x = 15,230,708.98
  5. Step 5: Solve for x
    x = 15,230,708.98/5,108.32
  6. Step 6: Final answer
    x = 2,981.55

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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.