Home / 21,479.07-29,641.37-11,919.15

Finding the Fourth Proportional to 21,479.07, 29,641.37 and 11,919.15

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Solution

The fourth proportional to 21,479.07, 29,641.37 and 11,919.15 is: 16,448.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,479.07 : 29,641.37 = 11,919.15 : x
  2. Step 2: Convert to fraction form
    21,479.07/29,641.37 = 11,919.15/x
  3. Step 3: Cross multiply
    21,479.07x = 29,641.37 × 11,919.15
  4. Step 4: Simplify right side
    21,479.07x = 353,299,909.16
  5. Step 5: Solve for x
    x = 353,299,909.16/21,479.07
  6. Step 6: Final answer
    x = 16,448.56

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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.