Home / 11,230.89-15,505.29-9,985.43

Finding the Fourth Proportional to 11,230.89, 15,505.29 and 9,985.43

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Solution

The fourth proportional to 11,230.89, 15,505.29 and 9,985.43 is: 13,785.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,230.89 : 15,505.29 = 9,985.43 : x
  2. Step 2: Convert to fraction form
    11,230.89/15,505.29 = 9,985.43/x
  3. Step 3: Cross multiply
    11,230.89x = 15,505.29 × 9,985.43
  4. Step 4: Simplify right side
    11,230.89x = 154,826,910.40
  5. Step 5: Solve for x
    x = 154,826,910.40/11,230.89
  6. Step 6: Final answer
    x = 13,785.81

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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.