Home / 21,921.40-32,882.10-8,783.20

Finding the Fourth Proportional to 21,921.40, 32,882.10 and 8,783.20

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Solution

The fourth proportional to 21,921.40, 32,882.10 and 8,783.20 is: 13,174.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,921.40 : 32,882.10 = 8,783.20 : x
  2. Step 2: Convert to fraction form
    21,921.40/32,882.10 = 8,783.20/x
  3. Step 3: Cross multiply
    21,921.40x = 32,882.10 × 8,783.20
  4. Step 4: Simplify right side
    21,921.40x = 288,810,060.72
  5. Step 5: Solve for x
    x = 288,810,060.72/21,921.40
  6. Step 6: Final answer
    x = 13,174.80

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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.