Home / 21,577.12-29,742.60-19,769.20

Finding the Fourth Proportional to 21,577.12, 29,742.60 and 19,769.20

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Solution

The fourth proportional to 21,577.12, 29,742.60 and 19,769.20 is: 27,250.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,577.12 : 29,742.60 = 19,769.20 : x
  2. Step 2: Convert to fraction form
    21,577.12/29,742.60 = 19,769.20/x
  3. Step 3: Cross multiply
    21,577.12x = 29,742.60 × 19,769.20
  4. Step 4: Simplify right side
    21,577.12x = 587,987,407.92
  5. Step 5: Solve for x
    x = 587,987,407.92/21,577.12
  6. Step 6: Final answer
    x = 27,250.50

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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.