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Finding the Fourth Proportional to 13,753.13, 18,979.31 and 9,045.81

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Solution

The fourth proportional to 13,753.13, 18,979.31 and 9,045.81 is: 12,483.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,753.13 : 18,979.31 = 9,045.81 : x
  2. Step 2: Convert to fraction form
    13,753.13/18,979.31 = 9,045.81/x
  3. Step 3: Cross multiply
    13,753.13x = 18,979.31 × 9,045.81
  4. Step 4: Simplify right side
    13,753.13x = 171,683,254.81
  5. Step 5: Solve for x
    x = 171,683,254.81/13,753.13
  6. Step 6: Final answer
    x = 12,483.22

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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.