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Finding the Fourth Proportional to 17,761.86, 26,661.15 and 13,087.08

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Solution

The fourth proportional to 17,761.86, 26,661.15 and 13,087.08 is: 19,644.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,761.86 : 26,661.15 = 13,087.08 : x
  2. Step 2: Convert to fraction form
    17,761.86/26,661.15 = 13,087.08/x
  3. Step 3: Cross multiply
    17,761.86x = 26,661.15 × 13,087.08
  4. Step 4: Simplify right side
    17,761.86x = 348,916,602.94
  5. Step 5: Solve for x
    x = 348,916,602.94/17,761.86
  6. Step 6: Final answer
    x = 19,644.15

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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.