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Finding the Fourth Proportional to 12,666.70, 17,479.49 and 7,001.15

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Solution

The fourth proportional to 12,666.70, 17,479.49 and 7,001.15 is: 9,661.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,666.70 : 17,479.49 = 7,001.15 : x
  2. Step 2: Convert to fraction form
    12,666.70/17,479.49 = 7,001.15/x
  3. Step 3: Cross multiply
    12,666.70x = 17,479.49 × 7,001.15
  4. Step 4: Simplify right side
    12,666.70x = 122,376,592.62
  5. Step 5: Solve for x
    x = 122,376,592.62/12,666.70
  6. Step 6: Final answer
    x = 9,661.29

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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.