Home / 20,919.11-28,869.03-11,487.67

Finding the Fourth Proportional to 20,919.11, 28,869.03 and 11,487.67

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Solution

The fourth proportional to 20,919.11, 28,869.03 and 11,487.67 is: 15,853.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,919.11 : 28,869.03 = 11,487.67 : x
  2. Step 2: Convert to fraction form
    20,919.11/28,869.03 = 11,487.67/x
  3. Step 3: Cross multiply
    20,919.11x = 28,869.03 × 11,487.67
  4. Step 4: Simplify right side
    20,919.11x = 331,637,817.69
  5. Step 5: Solve for x
    x = 331,637,817.69/20,919.11
  6. Step 6: Final answer
    x = 15,853.35

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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.