Home / 20,513.10-28,308.11-11,081.67

Finding the Fourth Proportional to 20,513.10, 28,308.11 and 11,081.67

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Solution

The fourth proportional to 20,513.10, 28,308.11 and 11,081.67 is: 15,292.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,513.10 : 28,308.11 = 11,081.67 : x
  2. Step 2: Convert to fraction form
    20,513.10/28,308.11 = 11,081.67/x
  3. Step 3: Cross multiply
    20,513.10x = 28,308.11 × 11,081.67
  4. Step 4: Simplify right side
    20,513.10x = 313,701,133.34
  5. Step 5: Solve for x
    x = 313,701,133.34/20,513.10
  6. Step 6: Final answer
    x = 15,292.72

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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.