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Finding the Fourth Proportional to 65,015.44, 97,513.20 and 20,636.40

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Solution

The fourth proportional to 65,015.44, 97,513.20 and 20,636.40 is: 30,951.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,015.44 : 97,513.20 = 20,636.40 : x
  2. Step 2: Convert to fraction form
    65,015.44/97,513.20 = 20,636.40/x
  3. Step 3: Cross multiply
    65,015.44x = 97,513.20 × 20,636.40
  4. Step 4: Simplify right side
    65,015.44x = 2,012,321,400.48
  5. Step 5: Solve for x
    x = 2,012,321,400.48/65,015.44
  6. Step 6: Final answer
    x = 30,951.44

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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.