Home / 20,665.60-28,518.81-11,234.37

Finding the Fourth Proportional to 20,665.60, 28,518.81 and 11,234.37

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Solution

The fourth proportional to 20,665.60, 28,518.81 and 11,234.37 is: 15,503.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,665.60 : 28,518.81 = 11,234.37 : x
  2. Step 2: Convert to fraction form
    20,665.60/28,518.81 = 11,234.37/x
  3. Step 3: Cross multiply
    20,665.60x = 28,518.81 × 11,234.37
  4. Step 4: Simplify right side
    20,665.60x = 320,390,720.91
  5. Step 5: Solve for x
    x = 320,390,720.91/20,665.60
  6. Step 6: Final answer
    x = 15,503.58

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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.