Home / 21,122.16-29,148.84-11,691.60

Finding the Fourth Proportional to 21,122.16, 29,148.84 and 11,691.60

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Solution

The fourth proportional to 21,122.16, 29,148.84 and 11,691.60 is: 16,134.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,122.16 : 29,148.84 = 11,691.60 : x
  2. Step 2: Convert to fraction form
    21,122.16/29,148.84 = 11,691.60/x
  3. Step 3: Cross multiply
    21,122.16x = 29,148.84 × 11,691.60
  4. Step 4: Simplify right side
    21,122.16x = 340,796,577.74
  5. Step 5: Solve for x
    x = 340,796,577.74/21,122.16
  6. Step 6: Final answer
    x = 16,134.55

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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.