Home / 8,911.68-13,365.41-2,988.78

Finding the Fourth Proportional to 8,911.68, 13,365.41 and 2,988.78

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Solution

The fourth proportional to 8,911.68, 13,365.41 and 2,988.78 is: 4,482.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,911.68 : 13,365.41 = 2,988.78 : x
  2. Step 2: Convert to fraction form
    8,911.68/13,365.41 = 2,988.78/x
  3. Step 3: Cross multiply
    8,911.68x = 13,365.41 × 2,988.78
  4. Step 4: Simplify right side
    8,911.68x = 39,946,305.43
  5. Step 5: Solve for x
    x = 39,946,305.43/8,911.68
  6. Step 6: Final answer
    x = 4,482.47

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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.