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Finding the Fourth Proportional to 26,986.80, 40,447.80 and 13,832.40

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Solution

The fourth proportional to 26,986.80, 40,447.80 and 13,832.40 is: 20,731.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,986.80 : 40,447.80 = 13,832.40 : x
  2. Step 2: Convert to fraction form
    26,986.80/40,447.80 = 13,832.40/x
  3. Step 3: Cross multiply
    26,986.80x = 40,447.80 × 13,832.40
  4. Step 4: Simplify right side
    26,986.80x = 559,490,148.72
  5. Step 5: Solve for x
    x = 559,490,148.72/26,986.80
  6. Step 6: Final answer
    x = 20,731.99

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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.