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Finding the Fourth Proportional to 18,998.96, 28,510.68 and 10,239.98

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Solution

The fourth proportional to 18,998.96, 28,510.68 and 10,239.98 is: 15,366.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,998.96 : 28,510.68 = 10,239.98 : x
  2. Step 2: Convert to fraction form
    18,998.96/28,510.68 = 10,239.98/x
  3. Step 3: Cross multiply
    18,998.96x = 28,510.68 × 10,239.98
  4. Step 4: Simplify right side
    18,998.96x = 291,948,792.99
  5. Step 5: Solve for x
    x = 291,948,792.99/18,998.96
  6. Step 6: Final answer
    x = 15,366.57

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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.