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Finding the Fourth Proportional to 26,881.20, 40,307.40 and 11,281.20

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Solution

The fourth proportional to 26,881.20, 40,307.40 and 11,281.20 is: 16,915.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,881.20 : 40,307.40 = 11,281.20 : x
  2. Step 2: Convert to fraction form
    26,881.20/40,307.40 = 11,281.20/x
  3. Step 3: Cross multiply
    26,881.20x = 40,307.40 × 11,281.20
  4. Step 4: Simplify right side
    26,881.20x = 454,715,840.88
  5. Step 5: Solve for x
    x = 454,715,840.88/26,881.20
  6. Step 6: Final answer
    x = 16,915.76

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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.