Home / 21,905.20-32,857.80-10,219.60

Finding the Fourth Proportional to 21,905.20, 32,857.80 and 10,219.60

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Solution

The fourth proportional to 21,905.20, 32,857.80 and 10,219.60 is: 15,329.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,905.20 : 32,857.80 = 10,219.60 : x
  2. Step 2: Convert to fraction form
    21,905.20/32,857.80 = 10,219.60/x
  3. Step 3: Cross multiply
    21,905.20x = 32,857.80 × 10,219.60
  4. Step 4: Simplify right side
    21,905.20x = 335,793,572.88
  5. Step 5: Solve for x
    x = 335,793,572.88/21,905.20
  6. Step 6: Final answer
    x = 15,329.40

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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.