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Finding the Fourth Proportional to 26,046.12, 38,978.44 and 21,311.40

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Solution

The fourth proportional to 26,046.12, 38,978.44 and 21,311.40 is: 31,892.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,046.12 : 38,978.44 = 21,311.40 : x
  2. Step 2: Convert to fraction form
    26,046.12/38,978.44 = 21,311.40/x
  3. Step 3: Cross multiply
    26,046.12x = 38,978.44 × 21,311.40
  4. Step 4: Simplify right side
    26,046.12x = 830,685,126.22
  5. Step 5: Solve for x
    x = 830,685,126.22/26,046.12
  6. Step 6: Final answer
    x = 31,892.85

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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.