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Finding the Fourth Proportional to 26,476.74, 39,720 and 8,708.40

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Solution

The fourth proportional to 26,476.74, 39,720 and 8,708.40 is: 13,064.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,476.74 : 39,720 = 8,708.40 : x
  2. Step 2: Convert to fraction form
    26,476.74/39,720 = 8,708.40/x
  3. Step 3: Cross multiply
    26,476.74x = 39,720 × 8,708.40
  4. Step 4: Simplify right side
    26,476.74x = 345,897,648
  5. Step 5: Solve for x
    x = 345,897,648/26,476.74
  6. Step 6: Final answer
    x = 13,064.21

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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.