Home / 20,904.08-28,850.18-12,945.22

Finding the Fourth Proportional to 20,904.08, 28,850.18 and 12,945.22

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Solution

The fourth proportional to 20,904.08, 28,850.18 and 12,945.22 is: 17,865.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,904.08 : 28,850.18 = 12,945.22 : x
  2. Step 2: Convert to fraction form
    20,904.08/28,850.18 = 12,945.22/x
  3. Step 3: Cross multiply
    20,904.08x = 28,850.18 × 12,945.22
  4. Step 4: Simplify right side
    20,904.08x = 373,471,790.29
  5. Step 5: Solve for x
    x = 373,471,790.29/20,904.08
  6. Step 6: Final answer
    x = 17,865.98

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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.