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Finding the Fourth Proportional to 8,760, 13,139.52 and 3,570.24

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Solution

The fourth proportional to 8,760, 13,139.52 and 3,570.24 is: 5,355.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,760 : 13,139.52 = 3,570.24 : x
  2. Step 2: Convert to fraction form
    8,760/13,139.52 = 3,570.24/x
  3. Step 3: Cross multiply
    8,760x = 13,139.52 × 3,570.24
  4. Step 4: Simplify right side
    8,760x = 46,911,239.88
  5. Step 5: Solve for x
    x = 46,911,239.88/8,760
  6. Step 6: Final answer
    x = 5,355.16

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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.