Home / 20,688.66-28,550.41-11,257.22

Finding the Fourth Proportional to 20,688.66, 28,550.41 and 11,257.22

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Solution

The fourth proportional to 20,688.66, 28,550.41 and 11,257.22 is: 15,535.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,688.66 : 28,550.41 = 11,257.22 : x
  2. Step 2: Convert to fraction form
    20,688.66/28,550.41 = 11,257.22/x
  3. Step 3: Cross multiply
    20,688.66x = 28,550.41 × 11,257.22
  4. Step 4: Simplify right side
    20,688.66x = 321,398,289.69
  5. Step 5: Solve for x
    x = 321,398,289.69/20,688.66
  6. Step 6: Final answer
    x = 15,535.00

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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.