Home / 21,121.44-29,147.28-11,690.16

Finding the Fourth Proportional to 21,121.44, 29,147.28 and 11,690.16

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Solution

The fourth proportional to 21,121.44, 29,147.28 and 11,690.16 is: 16,132.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,121.44 : 29,147.28 = 11,690.16 : x
  2. Step 2: Convert to fraction form
    21,121.44/29,147.28 = 11,690.16/x
  3. Step 3: Cross multiply
    21,121.44x = 29,147.28 × 11,690.16
  4. Step 4: Simplify right side
    21,121.44x = 340,736,366.76
  5. Step 5: Solve for x
    x = 340,736,366.76/21,121.44
  6. Step 6: Final answer
    x = 16,132.25

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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.