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Finding the Fourth Proportional to 18,829.19, 28,246.13 and 5,681.54

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Solution

The fourth proportional to 18,829.19, 28,246.13 and 5,681.54 is: 8,523.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,829.19 : 28,246.13 = 5,681.54 : x
  2. Step 2: Convert to fraction form
    18,829.19/28,246.13 = 5,681.54/x
  3. Step 3: Cross multiply
    18,829.19x = 28,246.13 × 5,681.54
  4. Step 4: Simplify right side
    18,829.19x = 160,481,390.41
  5. Step 5: Solve for x
    x = 160,481,390.41/18,829.19
  6. Step 6: Final answer
    x = 8,523.01

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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.