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Finding the Fourth Proportional to 26,899.30, 40,343.55 and 12,859.30

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Solution

The fourth proportional to 26,899.30, 40,343.55 and 12,859.30 is: 19,286.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,899.30 : 40,343.55 = 12,859.30 : x
  2. Step 2: Convert to fraction form
    26,899.30/40,343.55 = 12,859.30/x
  3. Step 3: Cross multiply
    26,899.30x = 40,343.55 × 12,859.30
  4. Step 4: Simplify right side
    26,899.30x = 518,789,812.52
  5. Step 5: Solve for x
    x = 518,789,812.52/26,899.30
  6. Step 6: Final answer
    x = 19,286.37

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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.