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Finding the Fourth Proportional to 40,660.84, 60,990.87 and 31,783.62

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Solution

The fourth proportional to 40,660.84, 60,990.87 and 31,783.62 is: 47,675.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,660.84 : 60,990.87 = 31,783.62 : x
  2. Step 2: Convert to fraction form
    40,660.84/60,990.87 = 31,783.62/x
  3. Step 3: Cross multiply
    40,660.84x = 60,990.87 × 31,783.62
  4. Step 4: Simplify right side
    40,660.84x = 1,938,510,635.55
  5. Step 5: Solve for x
    x = 1,938,510,635.55/40,660.84
  6. Step 6: Final answer
    x = 47,675.13

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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.