Home / 21,729.03-29,987.73-12,299.01

Finding the Fourth Proportional to 21,729.03, 29,987.73 and 12,299.01

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Solution

The fourth proportional to 21,729.03, 29,987.73 and 12,299.01 is: 16,973.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,729.03 : 29,987.73 = 12,299.01 : x
  2. Step 2: Convert to fraction form
    21,729.03/29,987.73 = 12,299.01/x
  3. Step 3: Cross multiply
    21,729.03x = 29,987.73 × 12,299.01
  4. Step 4: Simplify right side
    21,729.03x = 368,819,391.15
  5. Step 5: Solve for x
    x = 368,819,391.15/21,729.03
  6. Step 6: Final answer
    x = 16,973.58

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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.