Home / 20,410.80-28,167.12-11,913.36

Finding the Fourth Proportional to 20,410.80, 28,167.12 and 11,913.36

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Solution

The fourth proportional to 20,410.80, 28,167.12 and 11,913.36 is: 16,440.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,410.80 : 28,167.12 = 11,913.36 : x
  2. Step 2: Convert to fraction form
    20,410.80/28,167.12 = 11,913.36/x
  3. Step 3: Cross multiply
    20,410.80x = 28,167.12 × 11,913.36
  4. Step 4: Simplify right side
    20,410.80x = 335,565,040.72
  5. Step 5: Solve for x
    x = 335,565,040.72/20,410.80
  6. Step 6: Final answer
    x = 16,440.56

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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.