Home / 21,779.22-30,053.50-12,217.78

Finding the Fourth Proportional to 21,779.22, 30,053.50 and 12,217.78

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Solution

The fourth proportional to 21,779.22, 30,053.50 and 12,217.78 is: 16,859.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,779.22 : 30,053.50 = 12,217.78 : x
  2. Step 2: Convert to fraction form
    21,779.22/30,053.50 = 12,217.78/x
  3. Step 3: Cross multiply
    21,779.22x = 30,053.50 × 12,217.78
  4. Step 4: Simplify right side
    21,779.22x = 367,187,051.23
  5. Step 5: Solve for x
    x = 367,187,051.23/21,779.22
  6. Step 6: Final answer
    x = 16,859.51

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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.