Home / 15,789.42-21,779.94-11,535.28

Finding the Fourth Proportional to 15,789.42, 21,779.94 and 11,535.28

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Solution

The fourth proportional to 15,789.42, 21,779.94 and 11,535.28 is: 15,911.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,789.42 : 21,779.94 = 11,535.28 : x
  2. Step 2: Convert to fraction form
    15,789.42/21,779.94 = 11,535.28/x
  3. Step 3: Cross multiply
    15,789.42x = 21,779.94 × 11,535.28
  4. Step 4: Simplify right side
    15,789.42x = 251,237,706.28
  5. Step 5: Solve for x
    x = 251,237,706.28/15,789.42
  6. Step 6: Final answer
    x = 15,911.78

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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.