Home / 8,815.17-12,153.87-6,453.21

Finding the Fourth Proportional to 8,815.17, 12,153.87 and 6,453.21

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Solution

The fourth proportional to 8,815.17, 12,153.87 and 6,453.21 is: 8,897.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,815.17 : 12,153.87 = 6,453.21 : x
  2. Step 2: Convert to fraction form
    8,815.17/12,153.87 = 6,453.21/x
  3. Step 3: Cross multiply
    8,815.17x = 12,153.87 × 6,453.21
  4. Step 4: Simplify right side
    8,815.17x = 78,431,475.42
  5. Step 5: Solve for x
    x = 78,431,475.42/8,815.17
  6. Step 6: Final answer
    x = 8,897.33

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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.