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Finding the Fourth Proportional to 28,473.72, 42,719.72 and 13,683.72

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Solution

The fourth proportional to 28,473.72, 42,719.72 and 13,683.72 is: 20,529.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,473.72 : 42,719.72 = 13,683.72 : x
  2. Step 2: Convert to fraction form
    28,473.72/42,719.72 = 13,683.72/x
  3. Step 3: Cross multiply
    28,473.72x = 42,719.72 × 13,683.72
  4. Step 4: Simplify right side
    28,473.72x = 584,564,686.96
  5. Step 5: Solve for x
    x = 584,564,686.96/28,473.72
  6. Step 6: Final answer
    x = 20,529.97

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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.