Home / 11,115.28-16,681.16-5,271.92

Finding the Fourth Proportional to 11,115.28, 16,681.16 and 5,271.92

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Solution

The fourth proportional to 11,115.28, 16,681.16 and 5,271.92 is: 7,911.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,115.28 : 16,681.16 = 5,271.92 : x
  2. Step 2: Convert to fraction form
    11,115.28/16,681.16 = 5,271.92/x
  3. Step 3: Cross multiply
    11,115.28x = 16,681.16 × 5,271.92
  4. Step 4: Simplify right side
    11,115.28x = 87,941,741.03
  5. Step 5: Solve for x
    x = 87,941,741.03/11,115.28
  6. Step 6: Final answer
    x = 7,911.79

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.