Home / 21,548.88-29,742.12-13,170.24

Finding the Fourth Proportional to 21,548.88, 29,742.12 and 13,170.24

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Solution

The fourth proportional to 21,548.88, 29,742.12 and 13,170.24 is: 18,177.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,548.88 : 29,742.12 = 13,170.24 : x
  2. Step 2: Convert to fraction form
    21,548.88/29,742.12 = 13,170.24/x
  3. Step 3: Cross multiply
    21,548.88x = 29,742.12 × 13,170.24
  4. Step 4: Simplify right side
    21,548.88x = 391,710,858.51
  5. Step 5: Solve for x
    x = 391,710,858.51/21,548.88
  6. Step 6: Final answer
    x = 18,177.78

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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.