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Finding the Fourth Proportional to 18,359.91, 25,347.17 and 12,090.51

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Solution

The fourth proportional to 18,359.91, 25,347.17 and 12,090.51 is: 16,691.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,359.91 : 25,347.17 = 12,090.51 : x
  2. Step 2: Convert to fraction form
    18,359.91/25,347.17 = 12,090.51/x
  3. Step 3: Cross multiply
    18,359.91x = 25,347.17 × 12,090.51
  4. Step 4: Simplify right side
    18,359.91x = 306,460,212.36
  5. Step 5: Solve for x
    x = 306,460,212.36/18,359.91
  6. Step 6: Final answer
    x = 16,691.81

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1.5x scale

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.