Home / 20,816.92-28,718.64-13,648.56

Finding the Fourth Proportional to 20,816.92, 28,718.64 and 13,648.56

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Solution

The fourth proportional to 20,816.92, 28,718.64 and 13,648.56 is: 18,829.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,816.92 : 28,718.64 = 13,648.56 : x
  2. Step 2: Convert to fraction form
    20,816.92/28,718.64 = 13,648.56/x
  3. Step 3: Cross multiply
    20,816.92x = 28,718.64 × 13,648.56
  4. Step 4: Simplify right side
    20,816.92x = 391,968,081.16
  5. Step 5: Solve for x
    x = 391,968,081.16/20,816.92
  6. Step 6: Final answer
    x = 18,829.30

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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.