Home / 12,890.11-19,337.60-4,122.67

Finding the Fourth Proportional to 12,890.11, 19,337.60 and 4,122.67

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Solution

The fourth proportional to 12,890.11, 19,337.60 and 4,122.67 is: 6,184.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,890.11 : 19,337.60 = 4,122.67 : x
  2. Step 2: Convert to fraction form
    12,890.11/19,337.60 = 4,122.67/x
  3. Step 3: Cross multiply
    12,890.11x = 19,337.60 × 4,122.67
  4. Step 4: Simplify right side
    12,890.11x = 79,722,543.39
  5. Step 5: Solve for x
    x = 79,722,543.39/12,890.11
  6. Step 6: Final answer
    x = 6,184.78

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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.