Home / 20,322.18-30,478.23-13,788.90

Finding the Fourth Proportional to 20,322.18, 30,478.23 and 13,788.90

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Solution

The fourth proportional to 20,322.18, 30,478.23 and 13,788.90 is: 20,679.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,322.18 : 30,478.23 = 13,788.90 : x
  2. Step 2: Convert to fraction form
    20,322.18/30,478.23 = 13,788.90/x
  3. Step 3: Cross multiply
    20,322.18x = 30,478.23 × 13,788.90
  4. Step 4: Simplify right side
    20,322.18x = 420,261,265.65
  5. Step 5: Solve for x
    x = 420,261,265.65/20,322.18
  6. Step 6: Final answer
    x = 20,679.93

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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.