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Finding the Fourth Proportional to 28,718.74, 43,063.53 and 13,123

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Solution

The fourth proportional to 28,718.74, 43,063.53 and 13,123 is: 19,677.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,718.74 : 43,063.53 = 13,123 : x
  2. Step 2: Convert to fraction form
    28,718.74/43,063.53 = 13,123/x
  3. Step 3: Cross multiply
    28,718.74x = 43,063.53 × 13,123
  4. Step 4: Simplify right side
    28,718.74x = 565,122,704.19
  5. Step 5: Solve for x
    x = 565,122,704.19/28,718.74
  6. Step 6: Final answer
    x = 19,677.84

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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.