Home / 21,919.36-30,250.56-13,421.44

Finding the Fourth Proportional to 21,919.36, 30,250.56 and 13,421.44

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Solution

The fourth proportional to 21,919.36, 30,250.56 and 13,421.44 is: 18,522.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,919.36 : 30,250.56 = 13,421.44 : x
  2. Step 2: Convert to fraction form
    21,919.36/30,250.56 = 13,421.44/x
  3. Step 3: Cross multiply
    21,919.36x = 30,250.56 × 13,421.44
  4. Step 4: Simplify right side
    21,919.36x = 406,006,076.01
  5. Step 5: Solve for x
    x = 406,006,076.01/21,919.36
  6. Step 6: Final answer
    x = 18,522.72

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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.