Home / 21,422.40-29,560.24-11,988.64

Finding the Fourth Proportional to 21,422.40, 29,560.24 and 11,988.64

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Solution

The fourth proportional to 21,422.40, 29,560.24 and 11,988.64 is: 16,542.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,422.40 : 29,560.24 = 11,988.64 : x
  2. Step 2: Convert to fraction form
    21,422.40/29,560.24 = 11,988.64/x
  3. Step 3: Cross multiply
    21,422.40x = 29,560.24 × 11,988.64
  4. Step 4: Simplify right side
    21,422.40x = 354,387,075.67
  5. Step 5: Solve for x
    x = 354,387,075.67/21,422.40
  6. Step 6: Final answer
    x = 16,542.83

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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.