Home / 11,122.26-15,353.85-7,145.64

Finding the Fourth Proportional to 11,122.26, 15,353.85 and 7,145.64

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Solution

The fourth proportional to 11,122.26, 15,353.85 and 7,145.64 is: 9,864.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,122.26 : 15,353.85 = 7,145.64 : x
  2. Step 2: Convert to fraction form
    11,122.26/15,353.85 = 7,145.64/x
  3. Step 3: Cross multiply
    11,122.26x = 15,353.85 × 7,145.64
  4. Step 4: Simplify right side
    11,122.26x = 109,713,084.71
  5. Step 5: Solve for x
    x = 109,713,084.71/11,122.26
  6. Step 6: Final answer
    x = 9,864.28

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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.