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Finding the Fourth Proportional to 18,199.84, 25,120.08 and 11,572

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Solution

The fourth proportional to 18,199.84, 25,120.08 and 11,572 is: 15,972.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,199.84 : 25,120.08 = 11,572 : x
  2. Step 2: Convert to fraction form
    18,199.84/25,120.08 = 11,572/x
  3. Step 3: Cross multiply
    18,199.84x = 25,120.08 × 11,572
  4. Step 4: Simplify right side
    18,199.84x = 290,689,565.76
  5. Step 5: Solve for x
    x = 290,689,565.76/18,199.84
  6. Step 6: Final answer
    x = 15,972.09

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.