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Finding the Fourth Proportional to 13,018.68, 19,560.11 and 8,340.71

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Solution

The fourth proportional to 13,018.68, 19,560.11 and 8,340.71 is: 12,531.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,018.68 : 19,560.11 = 8,340.71 : x
  2. Step 2: Convert to fraction form
    13,018.68/19,560.11 = 8,340.71/x
  3. Step 3: Cross multiply
    13,018.68x = 19,560.11 × 8,340.71
  4. Step 4: Simplify right side
    13,018.68x = 163,145,065.57
  5. Step 5: Solve for x
    x = 163,145,065.57/13,018.68
  6. Step 6: Final answer
    x = 12,531.61

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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.