Home / 20,665.50-28,518.58-11,234.10

Finding the Fourth Proportional to 20,665.50, 28,518.58 and 11,234.10

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Solution

The fourth proportional to 20,665.50, 28,518.58 and 11,234.10 is: 15,503.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,665.50 : 28,518.58 = 11,234.10 : x
  2. Step 2: Convert to fraction form
    20,665.50/28,518.58 = 11,234.10/x
  3. Step 3: Cross multiply
    20,665.50x = 28,518.58 × 11,234.10
  4. Step 4: Simplify right side
    20,665.50x = 320,380,579.58
  5. Step 5: Solve for x
    x = 320,380,579.58/20,665.50
  6. Step 6: Final answer
    x = 15,503.16

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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.