Home / 20,645.32-28,490.52-11,213.89

Finding the Fourth Proportional to 20,645.32, 28,490.52 and 11,213.89

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Solution

The fourth proportional to 20,645.32, 28,490.52 and 11,213.89 is: 15,475.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,645.32 : 28,490.52 = 11,213.89 : x
  2. Step 2: Convert to fraction form
    20,645.32/28,490.52 = 11,213.89/x
  3. Step 3: Cross multiply
    20,645.32x = 28,490.52 × 11,213.89
  4. Step 4: Simplify right side
    20,645.32x = 319,489,557.32
  5. Step 5: Solve for x
    x = 319,489,557.32/20,645.32
  6. Step 6: Final answer
    x = 15,475.16

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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.