Home / 20,400.09-28,152.05-11,447.63

Finding the Fourth Proportional to 20,400.09, 28,152.05 and 11,447.63

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Solution

The fourth proportional to 20,400.09, 28,152.05 and 11,447.63 is: 15,797.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,400.09 : 28,152.05 = 11,447.63 : x
  2. Step 2: Convert to fraction form
    20,400.09/28,152.05 = 11,447.63/x
  3. Step 3: Cross multiply
    20,400.09x = 28,152.05 × 11,447.63
  4. Step 4: Simplify right side
    20,400.09x = 322,274,252.14
  5. Step 5: Solve for x
    x = 322,274,252.14/20,400.09
  6. Step 6: Final answer
    x = 15,797.69

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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.