Home / 21,579.22-29,778.86-12,019.07

Finding the Fourth Proportional to 21,579.22, 29,778.86 and 12,019.07

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Solution

The fourth proportional to 21,579.22, 29,778.86 and 12,019.07 is: 16,586.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,579.22 : 29,778.86 = 12,019.07 : x
  2. Step 2: Convert to fraction form
    21,579.22/29,778.86 = 12,019.07/x
  3. Step 3: Cross multiply
    21,579.22x = 29,778.86 × 12,019.07
  4. Step 4: Simplify right side
    21,579.22x = 357,914,301.47
  5. Step 5: Solve for x
    x = 357,914,301.47/21,579.22
  6. Step 6: Final answer
    x = 16,586.07

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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.