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Finding the Fourth Proportional to 19,991.14, 29,940.08 and 15,803.04

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Solution

The fourth proportional to 19,991.14, 29,940.08 and 15,803.04 is: 23,667.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,991.14 : 29,940.08 = 15,803.04 : x
  2. Step 2: Convert to fraction form
    19,991.14/29,940.08 = 15,803.04/x
  3. Step 3: Cross multiply
    19,991.14x = 29,940.08 × 15,803.04
  4. Step 4: Simplify right side
    19,991.14x = 473,144,281.84
  5. Step 5: Solve for x
    x = 473,144,281.84/19,991.14
  6. Step 6: Final answer
    x = 23,667.70

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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.