Home / 15,779.80-21,778.50-9,493.48

Finding the Fourth Proportional to 15,779.80, 21,778.50 and 9,493.48

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Solution

The fourth proportional to 15,779.80, 21,778.50 and 9,493.48 is: 13,102.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,779.80 : 21,778.50 = 9,493.48 : x
  2. Step 2: Convert to fraction form
    15,779.80/21,778.50 = 9,493.48/x
  3. Step 3: Cross multiply
    15,779.80x = 21,778.50 × 9,493.48
  4. Step 4: Simplify right side
    15,779.80x = 206,753,754.18
  5. Step 5: Solve for x
    x = 206,753,754.18/15,779.80
  6. Step 6: Final answer
    x = 13,102.43

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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.