Home / 21,856.20-32,784.30-13,086.60

Finding the Fourth Proportional to 21,856.20, 32,784.30 and 13,086.60

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Solution

The fourth proportional to 21,856.20, 32,784.30 and 13,086.60 is: 19,629.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,856.20 : 32,784.30 = 13,086.60 : x
  2. Step 2: Convert to fraction form
    21,856.20/32,784.30 = 13,086.60/x
  3. Step 3: Cross multiply
    21,856.20x = 32,784.30 × 13,086.60
  4. Step 4: Simplify right side
    21,856.20x = 429,035,020.38
  5. Step 5: Solve for x
    x = 429,035,020.38/21,856.20
  6. Step 6: Final answer
    x = 19,629.90

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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.