Home / 10,985.10-15,161.24-8,171.16

Finding the Fourth Proportional to 10,985.10, 15,161.24 and 8,171.16

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Solution

The fourth proportional to 10,985.10, 15,161.24 and 8,171.16 is: 11,277.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,985.10 : 15,161.24 = 8,171.16 : x
  2. Step 2: Convert to fraction form
    10,985.10/15,161.24 = 8,171.16/x
  3. Step 3: Cross multiply
    10,985.10x = 15,161.24 × 8,171.16
  4. Step 4: Simplify right side
    10,985.10x = 123,884,917.84
  5. Step 5: Solve for x
    x = 123,884,917.84/10,985.10
  6. Step 6: Final answer
    x = 11,277.54

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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.