Home / 8,919.62-12,315.24-7,972.53

Finding the Fourth Proportional to 8,919.62, 12,315.24 and 7,972.53

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Solution

The fourth proportional to 8,919.62, 12,315.24 and 7,972.53 is: 11,007.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,919.62 : 12,315.24 = 7,972.53 : x
  2. Step 2: Convert to fraction form
    8,919.62/12,315.24 = 7,972.53/x
  3. Step 3: Cross multiply
    8,919.62x = 12,315.24 × 7,972.53
  4. Step 4: Simplify right side
    8,919.62x = 98,183,574.18
  5. Step 5: Solve for x
    x = 98,183,574.18/8,919.62
  6. Step 6: Final answer
    x = 11,007.60

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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.