Home / 65,612.40-98,428.20-21,231.60

Finding the Fourth Proportional to 65,612.40, 98,428.20 and 21,231.60

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Solution

The fourth proportional to 65,612.40, 98,428.20 and 21,231.60 is: 31,850.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,612.40 : 98,428.20 = 21,231.60 : x
  2. Step 2: Convert to fraction form
    65,612.40/98,428.20 = 21,231.60/x
  3. Step 3: Cross multiply
    65,612.40x = 98,428.20 × 21,231.60
  4. Step 4: Simplify right side
    65,612.40x = 2,089,788,171.12
  5. Step 5: Solve for x
    x = 2,089,788,171.12/65,612.40
  6. Step 6: Final answer
    x = 31,850.51

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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.