Home / 8,685.36-13,017.78-3,135.78

Finding the Fourth Proportional to 8,685.36, 13,017.78 and 3,135.78

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Solution

The fourth proportional to 8,685.36, 13,017.78 and 3,135.78 is: 4,699.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,685.36 : 13,017.78 = 3,135.78 : x
  2. Step 2: Convert to fraction form
    8,685.36/13,017.78 = 3,135.78/x
  3. Step 3: Cross multiply
    8,685.36x = 13,017.78 × 3,135.78
  4. Step 4: Simplify right side
    8,685.36x = 40,820,894.17
  5. Step 5: Solve for x
    x = 40,820,894.17/8,685.36
  6. Step 6: Final answer
    x = 4,699.97

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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.