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Finding the Fourth Proportional to 17,760.03, 26,640.04 and 5,280

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Solution

The fourth proportional to 17,760.03, 26,640.04 and 5,280 is: 7,920.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,760.03 : 26,640.04 = 5,280 : x
  2. Step 2: Convert to fraction form
    17,760.03/26,640.04 = 5,280/x
  3. Step 3: Cross multiply
    17,760.03x = 26,640.04 × 5,280
  4. Step 4: Simplify right side
    17,760.03x = 140,659,411.20
  5. Step 5: Solve for x
    x = 140,659,411.20/17,760.03
  6. Step 6: Final answer
    x = 7,920.00

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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.