Home / 20,571.92-28,378.80-12,068.48

Finding the Fourth Proportional to 20,571.92, 28,378.80 and 12,068.48

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Solution

The fourth proportional to 20,571.92, 28,378.80 and 12,068.48 is: 16,648.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,571.92 : 28,378.80 = 12,068.48 : x
  2. Step 2: Convert to fraction form
    20,571.92/28,378.80 = 12,068.48/x
  3. Step 3: Cross multiply
    20,571.92x = 28,378.80 × 12,068.48
  4. Step 4: Simplify right side
    20,571.92x = 342,488,980.22
  5. Step 5: Solve for x
    x = 342,488,980.22/20,571.92
  6. Step 6: Final answer
    x = 16,648.37

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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.