Home / 20,875.54-28,807.64-11,922.86

Finding the Fourth Proportional to 20,875.54, 28,807.64 and 11,922.86

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Solution

The fourth proportional to 20,875.54, 28,807.64 and 11,922.86 is: 16,453.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,875.54 : 28,807.64 = 11,922.86 : x
  2. Step 2: Convert to fraction form
    20,875.54/28,807.64 = 11,922.86/x
  3. Step 3: Cross multiply
    20,875.54x = 28,807.64 × 11,922.86
  4. Step 4: Simplify right side
    20,875.54x = 343,469,314.61
  5. Step 5: Solve for x
    x = 343,469,314.61/20,875.54
  6. Step 6: Final answer
    x = 16,453.20

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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.