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Finding the Fourth Proportional to 26,989.88, 40,499.39 and 13,138.88

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Solution

The fourth proportional to 26,989.88, 40,499.39 and 13,138.88 is: 19,715.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,989.88 : 40,499.39 = 13,138.88 : x
  2. Step 2: Convert to fraction form
    26,989.88/40,499.39 = 13,138.88/x
  3. Step 3: Cross multiply
    26,989.88x = 40,499.39 × 13,138.88
  4. Step 4: Simplify right side
    26,989.88x = 532,116,455.63
  5. Step 5: Solve for x
    x = 532,116,455.63/26,989.88
  6. Step 6: Final answer
    x = 19,715.41

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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.