Home / 20,645.24-28,490.40-11,213.73

Finding the Fourth Proportional to 20,645.24, 28,490.40 and 11,213.73

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Solution

The fourth proportional to 20,645.24, 28,490.40 and 11,213.73 is: 15,474.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,645.24 : 28,490.40 = 11,213.73 : x
  2. Step 2: Convert to fraction form
    20,645.24/28,490.40 = 11,213.73/x
  3. Step 3: Cross multiply
    20,645.24x = 28,490.40 × 11,213.73
  4. Step 4: Simplify right side
    20,645.24x = 319,483,653.19
  5. Step 5: Solve for x
    x = 319,483,653.19/20,645.24
  6. Step 6: Final answer
    x = 15,474.93

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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.