Home / 10,989.50-15,164.60-6,209.86

Finding the Fourth Proportional to 10,989.50, 15,164.60 and 6,209.86

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Solution

The fourth proportional to 10,989.50, 15,164.60 and 6,209.86 is: 8,569.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,989.50 : 15,164.60 = 6,209.86 : x
  2. Step 2: Convert to fraction form
    10,989.50/15,164.60 = 6,209.86/x
  3. Step 3: Cross multiply
    10,989.50x = 15,164.60 × 6,209.86
  4. Step 4: Simplify right side
    10,989.50x = 94,169,936.08
  5. Step 5: Solve for x
    x = 94,169,936.08/10,989.50
  6. Step 6: Final answer
    x = 8,569.08

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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.