Home / 20,688.48-28,550.07-11,256.84

Finding the Fourth Proportional to 20,688.48, 28,550.07 and 11,256.84

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Solution

The fourth proportional to 20,688.48, 28,550.07 and 11,256.84 is: 15,534.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,688.48 : 28,550.07 = 11,256.84 : x
  2. Step 2: Convert to fraction form
    20,688.48/28,550.07 = 11,256.84/x
  3. Step 3: Cross multiply
    20,688.48x = 28,550.07 × 11,256.84
  4. Step 4: Simplify right side
    20,688.48x = 321,383,569.98
  5. Step 5: Solve for x
    x = 321,383,569.98/20,688.48
  6. Step 6: Final answer
    x = 15,534.42

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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.