Home / 20,319.40-30,631.40-18,964.67

Finding the Fourth Proportional to 20,319.40, 30,631.40 and 18,964.67

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Solution

The fourth proportional to 20,319.40, 30,631.40 and 18,964.67 is: 28,589.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,319.40 : 30,631.40 = 18,964.67 : x
  2. Step 2: Convert to fraction form
    20,319.40/30,631.40 = 18,964.67/x
  3. Step 3: Cross multiply
    20,319.40x = 30,631.40 × 18,964.67
  4. Step 4: Simplify right side
    20,319.40x = 580,914,374.39
  5. Step 5: Solve for x
    x = 580,914,374.39/20,319.40
  6. Step 6: Final answer
    x = 28,589.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.