Home / 20,688.74-28,550.46-11,257.28

Finding the Fourth Proportional to 20,688.74, 28,550.46 and 11,257.28

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Solution

The fourth proportional to 20,688.74, 28,550.46 and 11,257.28 is: 15,535.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,688.74 : 28,550.46 = 11,257.28 : x
  2. Step 2: Convert to fraction form
    20,688.74/28,550.46 = 11,257.28/x
  3. Step 3: Cross multiply
    20,688.74x = 28,550.46 × 11,257.28
  4. Step 4: Simplify right side
    20,688.74x = 321,400,522.35
  5. Step 5: Solve for x
    x = 321,400,522.35/20,688.74
  6. Step 6: Final answer
    x = 15,535.05

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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.