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Finding the Fourth Proportional to 18,423.29, 25,422.92 and 10,869.94

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Solution

The fourth proportional to 18,423.29, 25,422.92 and 10,869.94 is: 14,999.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,423.29 : 25,422.92 = 10,869.94 : x
  2. Step 2: Convert to fraction form
    18,423.29/25,422.92 = 10,869.94/x
  3. Step 3: Cross multiply
    18,423.29x = 25,422.92 × 10,869.94
  4. Step 4: Simplify right side
    18,423.29x = 276,345,615.02
  5. Step 5: Solve for x
    x = 276,345,615.02/18,423.29
  6. Step 6: Final answer
    x = 14,999.80

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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.