Home / 21,729.94-29,988.81-12,170.02

Finding the Fourth Proportional to 21,729.94, 29,988.81 and 12,170.02

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Solution

The fourth proportional to 21,729.94, 29,988.81 and 12,170.02 is: 16,795.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,729.94 : 29,988.81 = 12,170.02 : x
  2. Step 2: Convert to fraction form
    21,729.94/29,988.81 = 12,170.02/x
  3. Step 3: Cross multiply
    21,729.94x = 29,988.81 × 12,170.02
  4. Step 4: Simplify right side
    21,729.94x = 364,964,417.48
  5. Step 5: Solve for x
    x = 364,964,417.48/21,729.94
  6. Step 6: Final answer
    x = 16,795.46

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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.