Home / 21,555.11-29,745.50-12,479.22

Finding the Fourth Proportional to 21,555.11, 29,745.50 and 12,479.22

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Solution

The fourth proportional to 21,555.11, 29,745.50 and 12,479.22 is: 17,221.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,555.11 : 29,745.50 = 12,479.22 : x
  2. Step 2: Convert to fraction form
    21,555.11/29,745.50 = 12,479.22/x
  3. Step 3: Cross multiply
    21,555.11x = 29,745.50 × 12,479.22
  4. Step 4: Simplify right side
    21,555.11x = 371,200,669.71
  5. Step 5: Solve for x
    x = 371,200,669.71/21,555.11
  6. Step 6: Final answer
    x = 17,221.00

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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.