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Finding the Fourth Proportional to 8,815.70, 13,223.55 and 8,305.40

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Solution

The fourth proportional to 8,815.70, 13,223.55 and 8,305.40 is: 12,458.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,815.70 : 13,223.55 = 8,305.40 : x
  2. Step 2: Convert to fraction form
    8,815.70/13,223.55 = 8,305.40/x
  3. Step 3: Cross multiply
    8,815.70x = 13,223.55 × 8,305.40
  4. Step 4: Simplify right side
    8,815.70x = 109,826,872.17
  5. Step 5: Solve for x
    x = 109,826,872.17/8,815.70
  6. Step 6: Final answer
    x = 12,458.10

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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.