Home / 20,851.39-28,772.75-11,897.16

Finding the Fourth Proportional to 20,851.39, 28,772.75 and 11,897.16

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Solution

The fourth proportional to 20,851.39, 28,772.75 and 11,897.16 is: 16,416.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,851.39 : 28,772.75 = 11,897.16 : x
  2. Step 2: Convert to fraction form
    20,851.39/28,772.75 = 11,897.16/x
  3. Step 3: Cross multiply
    20,851.39x = 28,772.75 × 11,897.16
  4. Step 4: Simplify right side
    20,851.39x = 342,313,932.24
  5. Step 5: Solve for x
    x = 342,313,932.24/20,851.39
  6. Step 6: Final answer
    x = 16,416.84

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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.