Home / 20,834.30-28,751.10-11,402.76

Finding the Fourth Proportional to 20,834.30, 28,751.10 and 11,402.76

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Solution

The fourth proportional to 20,834.30, 28,751.10 and 11,402.76 is: 15,735.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,834.30 : 28,751.10 = 11,402.76 : x
  2. Step 2: Convert to fraction form
    20,834.30/28,751.10 = 11,402.76/x
  3. Step 3: Cross multiply
    20,834.30x = 28,751.10 × 11,402.76
  4. Step 4: Simplify right side
    20,834.30x = 327,841,893.04
  5. Step 5: Solve for x
    x = 327,841,893.04/20,834.30
  6. Step 6: Final answer
    x = 15,735.68

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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.