Home / 21,479.09-29,641.07-11,920.42

Finding the Fourth Proportional to 21,479.09, 29,641.07 and 11,920.42

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Solution

The fourth proportional to 21,479.09, 29,641.07 and 11,920.42 is: 16,450.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,479.09 : 29,641.07 = 11,920.42 : x
  2. Step 2: Convert to fraction form
    21,479.09/29,641.07 = 11,920.42/x
  3. Step 3: Cross multiply
    21,479.09x = 29,641.07 × 11,920.42
  4. Step 4: Simplify right side
    21,479.09x = 353,333,903.77
  5. Step 5: Solve for x
    x = 353,333,903.77/21,479.09
  6. Step 6: Final answer
    x = 16,450.13

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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.