Home / 8,519.96-12,780.01-5,315.22

Finding the Fourth Proportional to 8,519.96, 12,780.01 and 5,315.22

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Solution

The fourth proportional to 8,519.96, 12,780.01 and 5,315.22 is: 7,972.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,519.96 : 12,780.01 = 5,315.22 : x
  2. Step 2: Convert to fraction form
    8,519.96/12,780.01 = 5,315.22/x
  3. Step 3: Cross multiply
    8,519.96x = 12,780.01 × 5,315.22
  4. Step 4: Simplify right side
    8,519.96x = 67,928,599.20
  5. Step 5: Solve for x
    x = 67,928,599.20/8,519.96
  6. Step 6: Final answer
    x = 7,972.88

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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.