Home / 20,665.70-28,518.78-12,168.19

Finding the Fourth Proportional to 20,665.70, 28,518.78 and 12,168.19

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Solution

The fourth proportional to 20,665.70, 28,518.78 and 12,168.19 is: 16,792.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,665.70 : 28,518.78 = 12,168.19 : x
  2. Step 2: Convert to fraction form
    20,665.70/28,518.78 = 12,168.19/x
  3. Step 3: Cross multiply
    20,665.70x = 28,518.78 × 12,168.19
  4. Step 4: Simplify right side
    20,665.70x = 347,021,933.61
  5. Step 5: Solve for x
    x = 347,021,933.61/20,665.70
  6. Step 6: Final answer
    x = 16,792.17

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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.