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Finding the Fourth Proportional to 18,868.24, 28,314.24 and 10,553.70

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Solution

The fourth proportional to 18,868.24, 28,314.24 and 10,553.70 is: 15,837.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,868.24 : 28,314.24 = 10,553.70 : x
  2. Step 2: Convert to fraction form
    18,868.24/28,314.24 = 10,553.70/x
  3. Step 3: Cross multiply
    18,868.24x = 28,314.24 × 10,553.70
  4. Step 4: Simplify right side
    18,868.24x = 298,819,994.69
  5. Step 5: Solve for x
    x = 298,819,994.69/18,868.24
  6. Step 6: Final answer
    x = 15,837.19

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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.