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Finding the Fourth Proportional to 12,445.67, 18,624.65 and 7,767.88

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Solution

The fourth proportional to 12,445.67, 18,624.65 and 7,767.88 is: 11,624.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,445.67 : 18,624.65 = 7,767.88 : x
  2. Step 2: Convert to fraction form
    12,445.67/18,624.65 = 7,767.88/x
  3. Step 3: Cross multiply
    12,445.67x = 18,624.65 × 7,767.88
  4. Step 4: Simplify right side
    12,445.67x = 144,673,960.84
  5. Step 5: Solve for x
    x = 144,673,960.84/12,445.67
  6. Step 6: Final answer
    x = 11,624.44

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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.