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Finding the Fourth Proportional to 29,972.80, 44,959.20 and 12,455.20

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Solution

The fourth proportional to 29,972.80, 44,959.20 and 12,455.20 is: 18,682.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,972.80 : 44,959.20 = 12,455.20 : x
  2. Step 2: Convert to fraction form
    29,972.80/44,959.20 = 12,455.20/x
  3. Step 3: Cross multiply
    29,972.80x = 44,959.20 × 12,455.20
  4. Step 4: Simplify right side
    29,972.80x = 559,975,827.84
  5. Step 5: Solve for x
    x = 559,975,827.84/29,972.80
  6. Step 6: Final answer
    x = 18,682.80

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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.