Home / 20,742.04-28,623.90-11,310.40

Finding the Fourth Proportional to 20,742.04, 28,623.90 and 11,310.40

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Solution

The fourth proportional to 20,742.04, 28,623.90 and 11,310.40 is: 15,608.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,742.04 : 28,623.90 = 11,310.40 : x
  2. Step 2: Convert to fraction form
    20,742.04/28,623.90 = 11,310.40/x
  3. Step 3: Cross multiply
    20,742.04x = 28,623.90 × 11,310.40
  4. Step 4: Simplify right side
    20,742.04x = 323,747,758.56
  5. Step 5: Solve for x
    x = 323,747,758.56/20,742.04
  6. Step 6: Final answer
    x = 15,608.29

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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.