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Finding the Fourth Proportional to 15,219.20, 22,828.80 and 13,809.80

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Solution

The fourth proportional to 15,219.20, 22,828.80 and 13,809.80 is: 20,714.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,219.20 : 22,828.80 = 13,809.80 : x
  2. Step 2: Convert to fraction form
    15,219.20/22,828.80 = 13,809.80/x
  3. Step 3: Cross multiply
    15,219.20x = 22,828.80 × 13,809.80
  4. Step 4: Simplify right side
    15,219.20x = 315,261,162.24
  5. Step 5: Solve for x
    x = 315,261,162.24/15,219.20
  6. Step 6: Final answer
    x = 20,714.70

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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.