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Finding the Fourth Proportional to 26,181, 36,129.50 and 15,570.40

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Solution

The fourth proportional to 26,181, 36,129.50 and 15,570.40 is: 21,486.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,181 : 36,129.50 = 15,570.40 : x
  2. Step 2: Convert to fraction form
    26,181/36,129.50 = 15,570.40/x
  3. Step 3: Cross multiply
    26,181x = 36,129.50 × 15,570.40
  4. Step 4: Simplify right side
    26,181x = 562,550,766.80
  5. Step 5: Solve for x
    x = 562,550,766.80/26,181
  6. Step 6: Final answer
    x = 21,486.99

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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.