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Finding the Fourth Proportional to 40,459.75, 60,689.63 and 12,757.75

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Solution

The fourth proportional to 40,459.75, 60,689.63 and 12,757.75 is: 19,136.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,459.75 : 60,689.63 = 12,757.75 : x
  2. Step 2: Convert to fraction form
    40,459.75/60,689.63 = 12,757.75/x
  3. Step 3: Cross multiply
    40,459.75x = 60,689.63 × 12,757.75
  4. Step 4: Simplify right side
    40,459.75x = 774,263,063.34
  5. Step 5: Solve for x
    x = 774,263,063.34/40,459.75
  6. Step 6: Final answer
    x = 19,136.63

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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.