Home / 20,572.21-28,389.42-12,072.81

Finding the Fourth Proportional to 20,572.21, 28,389.42 and 12,072.81

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Solution

The fourth proportional to 20,572.21, 28,389.42 and 12,072.81 is: 16,660.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,572.21 : 28,389.42 = 12,072.81 : x
  2. Step 2: Convert to fraction form
    20,572.21/28,389.42 = 12,072.81/x
  3. Step 3: Cross multiply
    20,572.21x = 28,389.42 × 12,072.81
  4. Step 4: Simplify right side
    20,572.21x = 342,740,180.13
  5. Step 5: Solve for x
    x = 342,740,180.13/20,572.21
  6. Step 6: Final answer
    x = 16,660.35

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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.