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Finding the Fourth Proportional to 8,670.70, 13,007.40 and 2,825.95

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Solution

The fourth proportional to 8,670.70, 13,007.40 and 2,825.95 is: 4,239.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,670.70 : 13,007.40 = 2,825.95 : x
  2. Step 2: Convert to fraction form
    8,670.70/13,007.40 = 2,825.95/x
  3. Step 3: Cross multiply
    8,670.70x = 13,007.40 × 2,825.95
  4. Step 4: Simplify right side
    8,670.70x = 36,758,218.91
  5. Step 5: Solve for x
    x = 36,758,218.91/8,670.70
  6. Step 6: Final answer
    x = 4,239.36

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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.