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Finding the Fourth Proportional to 28,497.17, 42,722.69 and 11,869.69

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Solution

The fourth proportional to 28,497.17, 42,722.69 and 11,869.69 is: 17,794.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,497.17 : 42,722.69 = 11,869.69 : x
  2. Step 2: Convert to fraction form
    28,497.17/42,722.69 = 11,869.69/x
  3. Step 3: Cross multiply
    28,497.17x = 42,722.69 × 11,869.69
  4. Step 4: Simplify right side
    28,497.17x = 507,105,066.98
  5. Step 5: Solve for x
    x = 507,105,066.98/28,497.17
  6. Step 6: Final answer
    x = 17,794.93

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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.