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Finding the Fourth Proportional to 20,356.48, 30,482.88 and 13,409.92

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Solution

The fourth proportional to 20,356.48, 30,482.88 and 13,409.92 is: 20,080.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,356.48 : 30,482.88 = 13,409.92 : x
  2. Step 2: Convert to fraction form
    20,356.48/30,482.88 = 13,409.92/x
  3. Step 3: Cross multiply
    20,356.48x = 30,482.88 × 13,409.92
  4. Step 4: Simplify right side
    20,356.48x = 408,772,982.17
  5. Step 5: Solve for x
    x = 408,772,982.17/20,356.48
  6. Step 6: Final answer
    x = 20,080.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.