Home / 21,914.20-32,828.10-12,669.40

Finding the Fourth Proportional to 21,914.20, 32,828.10 and 12,669.40

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Solution

The fourth proportional to 21,914.20, 32,828.10 and 12,669.40 is: 18,979.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,914.20 : 32,828.10 = 12,669.40 : x
  2. Step 2: Convert to fraction form
    21,914.20/32,828.10 = 12,669.40/x
  3. Step 3: Cross multiply
    21,914.20x = 32,828.10 × 12,669.40
  4. Step 4: Simplify right side
    21,914.20x = 415,912,330.14
  5. Step 5: Solve for x
    x = 415,912,330.14/21,914.20
  6. Step 6: Final answer
    x = 18,979.12

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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.