Home / 20,586.82-28,409.98-11,155.38

Finding the Fourth Proportional to 20,586.82, 28,409.98 and 11,155.38

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Solution

The fourth proportional to 20,586.82, 28,409.98 and 11,155.38 is: 15,394.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,586.82 : 28,409.98 = 11,155.38 : x
  2. Step 2: Convert to fraction form
    20,586.82/28,409.98 = 11,155.38/x
  3. Step 3: Cross multiply
    20,586.82x = 28,409.98 × 11,155.38
  4. Step 4: Simplify right side
    20,586.82x = 316,924,122.69
  5. Step 5: Solve for x
    x = 316,924,122.69/20,586.82
  6. Step 6: Final answer
    x = 15,394.52

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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.