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Finding the Fourth Proportional to 21,809.80, 32,714.70 and 14,811.40

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Solution

The fourth proportional to 21,809.80, 32,714.70 and 14,811.40 is: 22,217.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,809.80 : 32,714.70 = 14,811.40 : x
  2. Step 2: Convert to fraction form
    21,809.80/32,714.70 = 14,811.40/x
  3. Step 3: Cross multiply
    21,809.80x = 32,714.70 × 14,811.40
  4. Step 4: Simplify right side
    21,809.80x = 484,550,507.58
  5. Step 5: Solve for x
    x = 484,550,507.58/21,809.80
  6. Step 6: Final answer
    x = 22,217.10

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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.