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Finding the Fourth Proportional to 40,011.50, 60,018.06 and 12,309.50

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Solution

The fourth proportional to 40,011.50, 60,018.06 and 12,309.50 is: 18,464.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,011.50 : 60,018.06 = 12,309.50 : x
  2. Step 2: Convert to fraction form
    40,011.50/60,018.06 = 12,309.50/x
  3. Step 3: Cross multiply
    40,011.50x = 60,018.06 × 12,309.50
  4. Step 4: Simplify right side
    40,011.50x = 738,792,309.57
  5. Step 5: Solve for x
    x = 738,792,309.57/40,011.50
  6. Step 6: Final answer
    x = 18,464.50

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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.