Home / 20,287.98-27,992.32-12,637.28

Finding the Fourth Proportional to 20,287.98, 27,992.32 and 12,637.28

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Solution

The fourth proportional to 20,287.98, 27,992.32 and 12,637.28 is: 17,436.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,287.98 : 27,992.32 = 12,637.28 : x
  2. Step 2: Convert to fraction form
    20,287.98/27,992.32 = 12,637.28/x
  3. Step 3: Cross multiply
    20,287.98x = 27,992.32 × 12,637.28
  4. Step 4: Simplify right side
    20,287.98x = 353,746,719.11
  5. Step 5: Solve for x
    x = 353,746,719.11/20,287.98
  6. Step 6: Final answer
    x = 17,436.27

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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.