Home / 21,297.54-31,880.61-13,886.04

Finding the Fourth Proportional to 21,297.54, 31,880.61 and 13,886.04

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Solution

The fourth proportional to 21,297.54, 31,880.61 and 13,886.04 is: 20,786.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,297.54 : 31,880.61 = 13,886.04 : x
  2. Step 2: Convert to fraction form
    21,297.54/31,880.61 = 13,886.04/x
  3. Step 3: Cross multiply
    21,297.54x = 31,880.61 × 13,886.04
  4. Step 4: Simplify right side
    21,297.54x = 442,695,425.68
  5. Step 5: Solve for x
    x = 442,695,425.68/21,297.54
  6. Step 6: Final answer
    x = 20,786.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.