Home / 8,985.11-12,398.49-5,209.46

Finding the Fourth Proportional to 8,985.11, 12,398.49 and 5,209.46

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Solution

The fourth proportional to 8,985.11, 12,398.49 and 5,209.46 is: 7,188.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,985.11 : 12,398.49 = 5,209.46 : x
  2. Step 2: Convert to fraction form
    8,985.11/12,398.49 = 5,209.46/x
  3. Step 3: Cross multiply
    8,985.11x = 12,398.49 × 5,209.46
  4. Step 4: Simplify right side
    8,985.11x = 64,589,375.72
  5. Step 5: Solve for x
    x = 64,589,375.72/8,985.11
  6. Step 6: Final answer
    x = 7,188.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.