Home / 21,479.83-29,642.10-11,921.18

Finding the Fourth Proportional to 21,479.83, 29,642.10 and 11,921.18

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Solution

The fourth proportional to 21,479.83, 29,642.10 and 11,921.18 is: 16,451.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,479.83 : 29,642.10 = 11,921.18 : x
  2. Step 2: Convert to fraction form
    21,479.83/29,642.10 = 11,921.18/x
  3. Step 3: Cross multiply
    21,479.83x = 29,642.10 × 11,921.18
  4. Step 4: Simplify right side
    21,479.83x = 353,368,683.82
  5. Step 5: Solve for x
    x = 353,368,683.82/21,479.83
  6. Step 6: Final answer
    x = 16,451.18

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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.