Home / 21,729.60-29,988.48-12,168.99

Finding the Fourth Proportional to 21,729.60, 29,988.48 and 12,168.99

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Solution

The fourth proportional to 21,729.60, 29,988.48 and 12,168.99 is: 16,794.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,729.60 : 29,988.48 = 12,168.99 : x
  2. Step 2: Convert to fraction form
    21,729.60/29,988.48 = 12,168.99/x
  3. Step 3: Cross multiply
    21,729.60x = 29,988.48 × 12,168.99
  4. Step 4: Simplify right side
    21,729.60x = 364,929,513.24
  5. Step 5: Solve for x
    x = 364,929,513.24/21,729.60
  6. Step 6: Final answer
    x = 16,794.12

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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.