Home / 11,882.40-16,400.16-7,169.28

Finding the Fourth Proportional to 11,882.40, 16,400.16 and 7,169.28

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Solution

The fourth proportional to 11,882.40, 16,400.16 and 7,169.28 is: 9,895.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,882.40 : 16,400.16 = 7,169.28 : x
  2. Step 2: Convert to fraction form
    11,882.40/16,400.16 = 7,169.28/x
  3. Step 3: Cross multiply
    11,882.40x = 16,400.16 × 7,169.28
  4. Step 4: Simplify right side
    11,882.40x = 117,577,339.08
  5. Step 5: Solve for x
    x = 117,577,339.08/11,882.40
  6. Step 6: Final answer
    x = 9,895.08

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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.