Home / 21,222.40-29,277.84-13,259.20

Finding the Fourth Proportional to 21,222.40, 29,277.84 and 13,259.20

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Solution

The fourth proportional to 21,222.40, 29,277.84 and 13,259.20 is: 18,292.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,222.40 : 29,277.84 = 13,259.20 : x
  2. Step 2: Convert to fraction form
    21,222.40/29,277.84 = 13,259.20/x
  3. Step 3: Cross multiply
    21,222.40x = 29,277.84 × 13,259.20
  4. Step 4: Simplify right side
    21,222.40x = 388,200,736.13
  5. Step 5: Solve for x
    x = 388,200,736.13/21,222.40
  6. Step 6: Final answer
    x = 18,292.03

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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.