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Finding the Fourth Proportional to 18,424.64, 25,424.74 and 10,869.23

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Solution

The fourth proportional to 18,424.64, 25,424.74 and 10,869.23 is: 14,998.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,424.64 : 25,424.74 = 10,869.23 : x
  2. Step 2: Convert to fraction form
    18,424.64/25,424.74 = 10,869.23/x
  3. Step 3: Cross multiply
    18,424.64x = 25,424.74 × 10,869.23
  4. Step 4: Simplify right side
    18,424.64x = 276,347,346.75
  5. Step 5: Solve for x
    x = 276,347,346.75/18,424.64
  6. Step 6: Final answer
    x = 14,998.79

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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.