Home / 20,945.39-28,904.60-11,385.27

Finding the Fourth Proportional to 20,945.39, 28,904.60 and 11,385.27

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Solution

The fourth proportional to 20,945.39, 28,904.60 and 11,385.27 is: 15,711.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,945.39 : 28,904.60 = 11,385.27 : x
  2. Step 2: Convert to fraction form
    20,945.39/28,904.60 = 11,385.27/x
  3. Step 3: Cross multiply
    20,945.39x = 28,904.60 × 11,385.27
  4. Step 4: Simplify right side
    20,945.39x = 329,086,703.71
  5. Step 5: Solve for x
    x = 329,086,703.71/20,945.39
  6. Step 6: Final answer
    x = 15,711.66

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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.