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Finding the Fourth Proportional to 12,568.61, 18,716.24 and 12,430.56

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Solution

The fourth proportional to 12,568.61, 18,716.24 and 12,430.56 is: 18,510.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,568.61 : 18,716.24 = 12,430.56 : x
  2. Step 2: Convert to fraction form
    12,568.61/18,716.24 = 12,430.56/x
  3. Step 3: Cross multiply
    12,568.61x = 18,716.24 × 12,430.56
  4. Step 4: Simplify right side
    12,568.61x = 232,653,375.37
  5. Step 5: Solve for x
    x = 232,653,375.37/12,568.61
  6. Step 6: Final answer
    x = 18,510.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.