Home / 20,665.95-28,518.22-11,234.51

Finding the Fourth Proportional to 20,665.95, 28,518.22 and 11,234.51

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Solution

The fourth proportional to 20,665.95, 28,518.22 and 11,234.51 is: 15,503.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,665.95 : 28,518.22 = 11,234.51 : x
  2. Step 2: Convert to fraction form
    20,665.95/28,518.22 = 11,234.51/x
  3. Step 3: Cross multiply
    20,665.95x = 28,518.22 × 11,234.51
  4. Step 4: Simplify right side
    20,665.95x = 320,388,270.98
  5. Step 5: Solve for x
    x = 320,388,270.98/20,665.95
  6. Step 6: Final answer
    x = 15,503.20

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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.