Home / 10,939.57-15,091.36-7,161.07

Finding the Fourth Proportional to 10,939.57, 15,091.36 and 7,161.07

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Solution

The fourth proportional to 10,939.57, 15,091.36 and 7,161.07 is: 9,878.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,939.57 : 15,091.36 = 7,161.07 : x
  2. Step 2: Convert to fraction form
    10,939.57/15,091.36 = 7,161.07/x
  3. Step 3: Cross multiply
    10,939.57x = 15,091.36 × 7,161.07
  4. Step 4: Simplify right side
    10,939.57x = 108,070,285.36
  5. Step 5: Solve for x
    x = 108,070,285.36/10,939.57
  6. Step 6: Final answer
    x = 9,878.84

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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.