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Finding the Fourth Proportional to 8,700.78, 13,051.20 and 2,544.78

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Solution

The fourth proportional to 8,700.78, 13,051.20 and 2,544.78 is: 3,817.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,700.78 : 13,051.20 = 2,544.78 : x
  2. Step 2: Convert to fraction form
    8,700.78/13,051.20 = 2,544.78/x
  3. Step 3: Cross multiply
    8,700.78x = 13,051.20 × 2,544.78
  4. Step 4: Simplify right side
    8,700.78x = 33,212,432.74
  5. Step 5: Solve for x
    x = 33,212,432.74/8,700.78
  6. Step 6: Final answer
    x = 3,817.18

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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.