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Finding the Fourth Proportional to 8,707.80, 13,061.70 and 2,551.80

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Solution

The fourth proportional to 8,707.80, 13,061.70 and 2,551.80 is: 3,827.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,707.80 : 13,061.70 = 2,551.80 : x
  2. Step 2: Convert to fraction form
    8,707.80/13,061.70 = 2,551.80/x
  3. Step 3: Cross multiply
    8,707.80x = 13,061.70 × 2,551.80
  4. Step 4: Simplify right side
    8,707.80x = 33,330,846.06
  5. Step 5: Solve for x
    x = 33,330,846.06/8,707.80
  6. Step 6: Final answer
    x = 3,827.70

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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.