Home / 21,867.87-30,179.18-12,308.67

Finding the Fourth Proportional to 21,867.87, 30,179.18 and 12,308.67

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Solution

The fourth proportional to 21,867.87, 30,179.18 and 12,308.67 is: 16,986.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,867.87 : 30,179.18 = 12,308.67 : x
  2. Step 2: Convert to fraction form
    21,867.87/30,179.18 = 12,308.67/x
  3. Step 3: Cross multiply
    21,867.87x = 30,179.18 × 12,308.67
  4. Step 4: Simplify right side
    21,867.87x = 371,465,567.49
  5. Step 5: Solve for x
    x = 371,465,567.49/21,867.87
  6. Step 6: Final answer
    x = 16,986.82

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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.