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Finding the Fourth Proportional to 8,815.80, 12,167.94 and 5,281.08

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Solution

The fourth proportional to 8,815.80, 12,167.94 and 5,281.08 is: 7,289.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,815.80 : 12,167.94 = 5,281.08 : x
  2. Step 2: Convert to fraction form
    8,815.80/12,167.94 = 5,281.08/x
  3. Step 3: Cross multiply
    8,815.80x = 12,167.94 × 5,281.08
  4. Step 4: Simplify right side
    8,815.80x = 64,259,864.58
  5. Step 5: Solve for x
    x = 64,259,864.58/8,815.80
  6. Step 6: Final answer
    x = 7,289.17

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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.