Home / 11,320.88-15,621-7,126.16

Finding the Fourth Proportional to 11,320.88, 15,621 and 7,126.16

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Solution

The fourth proportional to 11,320.88, 15,621 and 7,126.16 is: 9,832.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,320.88 : 15,621 = 7,126.16 : x
  2. Step 2: Convert to fraction form
    11,320.88/15,621 = 7,126.16/x
  3. Step 3: Cross multiply
    11,320.88x = 15,621 × 7,126.16
  4. Step 4: Simplify right side
    11,320.88x = 111,317,745.36
  5. Step 5: Solve for x
    x = 111,317,745.36/11,320.88
  6. Step 6: Final answer
    x = 9,832.96

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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.