Home / 20,289.12-30,411.84-13,266.48

Finding the Fourth Proportional to 20,289.12, 30,411.84 and 13,266.48

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Solution

The fourth proportional to 20,289.12, 30,411.84 and 13,266.48 is: 19,885.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,289.12 : 30,411.84 = 13,266.48 : x
  2. Step 2: Convert to fraction form
    20,289.12/30,411.84 = 13,266.48/x
  3. Step 3: Cross multiply
    20,289.12x = 30,411.84 × 13,266.48
  4. Step 4: Simplify right side
    20,289.12x = 403,458,067.12
  5. Step 5: Solve for x
    x = 403,458,067.12/20,289.12
  6. Step 6: Final answer
    x = 19,885.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.