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Finding the Fourth Proportional to 18,875.72, 28,324.44 and 11,090

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Solution

The fourth proportional to 18,875.72, 28,324.44 and 11,090 is: 16,641.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,875.72 : 28,324.44 = 11,090 : x
  2. Step 2: Convert to fraction form
    18,875.72/28,324.44 = 11,090/x
  3. Step 3: Cross multiply
    18,875.72x = 28,324.44 × 11,090
  4. Step 4: Simplify right side
    18,875.72x = 314,118,039.60
  5. Step 5: Solve for x
    x = 314,118,039.60/18,875.72
  6. Step 6: Final answer
    x = 16,641.38

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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.