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Finding the Fourth Proportional to 39,880.56, 59,817.12 and 12,178.56

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Solution

The fourth proportional to 39,880.56, 59,817.12 and 12,178.56 is: 18,266.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,880.56 : 59,817.12 = 12,178.56 : x
  2. Step 2: Convert to fraction form
    39,880.56/59,817.12 = 12,178.56/x
  3. Step 3: Cross multiply
    39,880.56x = 59,817.12 × 12,178.56
  4. Step 4: Simplify right side
    39,880.56x = 728,486,384.95
  5. Step 5: Solve for x
    x = 728,486,384.95/39,880.56
  6. Step 6: Final answer
    x = 18,266.70

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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.