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Finding the Fourth Proportional to 40,603.20, 60,856.20 and 20,871.60

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Solution

The fourth proportional to 40,603.20, 60,856.20 and 20,871.60 is: 31,282.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,603.20 : 60,856.20 = 20,871.60 : x
  2. Step 2: Convert to fraction form
    40,603.20/60,856.20 = 20,871.60/x
  3. Step 3: Cross multiply
    40,603.20x = 60,856.20 × 20,871.60
  4. Step 4: Simplify right side
    40,603.20x = 1,270,166,263.92
  5. Step 5: Solve for x
    x = 1,270,166,263.92/40,603.20
  6. Step 6: Final answer
    x = 31,282.42

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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.