Home / 20,945.32-28,895.40-11,990.77

Finding the Fourth Proportional to 20,945.32, 28,895.40 and 11,990.77

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Solution

The fourth proportional to 20,945.32, 28,895.40 and 11,990.77 is: 16,542.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,945.32 : 28,895.40 = 11,990.77 : x
  2. Step 2: Convert to fraction form
    20,945.32/28,895.40 = 11,990.77/x
  3. Step 3: Cross multiply
    20,945.32x = 28,895.40 × 11,990.77
  4. Step 4: Simplify right side
    20,945.32x = 346,478,023.22
  5. Step 5: Solve for x
    x = 346,478,023.22/20,945.32
  6. Step 6: Final answer
    x = 16,542.03

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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.