Home / 20,288.90-30,378.66-13,251.48

Finding the Fourth Proportional to 20,288.90, 30,378.66 and 13,251.48

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Solution

The fourth proportional to 20,288.90, 30,378.66 and 13,251.48 is: 19,841.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,288.90 : 30,378.66 = 13,251.48 : x
  2. Step 2: Convert to fraction form
    20,288.90/30,378.66 = 13,251.48/x
  3. Step 3: Cross multiply
    20,288.90x = 30,378.66 × 13,251.48
  4. Step 4: Simplify right side
    20,288.90x = 402,562,205.42
  5. Step 5: Solve for x
    x = 402,562,205.42/20,288.90
  6. Step 6: Final answer
    x = 19,841.50

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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.