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Finding the Fourth Proportional to 12,666.78, 17,470.18 and 11,817.93

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Solution

The fourth proportional to 12,666.78, 17,470.18 and 11,817.93 is: 16,299.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,666.78 : 17,470.18 = 11,817.93 : x
  2. Step 2: Convert to fraction form
    12,666.78/17,470.18 = 11,817.93/x
  3. Step 3: Cross multiply
    12,666.78x = 17,470.18 × 11,817.93
  4. Step 4: Simplify right side
    12,666.78x = 206,461,444.61
  5. Step 5: Solve for x
    x = 206,461,444.61/12,666.78
  6. Step 6: Final answer
    x = 16,299.44

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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.