Home / 21,681.19-29,922.83-12,729.48

Finding the Fourth Proportional to 21,681.19, 29,922.83 and 12,729.48

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Solution

The fourth proportional to 21,681.19, 29,922.83 and 12,729.48 is: 17,568.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,681.19 : 29,922.83 = 12,729.48 : x
  2. Step 2: Convert to fraction form
    21,681.19/29,922.83 = 12,729.48/x
  3. Step 3: Cross multiply
    21,681.19x = 29,922.83 × 12,729.48
  4. Step 4: Simplify right side
    21,681.19x = 380,902,066.03
  5. Step 5: Solve for x
    x = 380,902,066.03/21,681.19
  6. Step 6: Final answer
    x = 17,568.32

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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.