Home / 20,449.84-28,234.76-15,661.32

Finding the Fourth Proportional to 20,449.84, 28,234.76 and 15,661.32

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Solution

The fourth proportional to 20,449.84, 28,234.76 and 15,661.32 is: 21,623.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,449.84 : 28,234.76 = 15,661.32 : x
  2. Step 2: Convert to fraction form
    20,449.84/28,234.76 = 15,661.32/x
  3. Step 3: Cross multiply
    20,449.84x = 28,234.76 × 15,661.32
  4. Step 4: Simplify right side
    20,449.84x = 442,193,533.18
  5. Step 5: Solve for x
    x = 442,193,533.18/20,449.84
  6. Step 6: Final answer
    x = 21,623.33

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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.