Home / 20,643.72-28,488.34-11,212.29

Finding the Fourth Proportional to 20,643.72, 28,488.34 and 11,212.29

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Solution

The fourth proportional to 20,643.72, 28,488.34 and 11,212.29 is: 15,472.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,643.72 : 28,488.34 = 11,212.29 : x
  2. Step 2: Convert to fraction form
    20,643.72/28,488.34 = 11,212.29/x
  3. Step 3: Cross multiply
    20,643.72x = 28,488.34 × 11,212.29
  4. Step 4: Simplify right side
    20,643.72x = 319,419,529.70
  5. Step 5: Solve for x
    x = 319,419,529.70/20,643.72
  6. Step 6: Final answer
    x = 15,472.96

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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.