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Finding the Fourth Proportional to 18,423.81, 25,425.27 and 10,871.99

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Solution

The fourth proportional to 18,423.81, 25,425.27 and 10,871.99 is: 15,003.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,423.81 : 25,425.27 = 10,871.99 : x
  2. Step 2: Convert to fraction form
    18,423.81/25,425.27 = 10,871.99/x
  3. Step 3: Cross multiply
    18,423.81x = 25,425.27 × 10,871.99
  4. Step 4: Simplify right side
    18,423.81x = 276,423,154.06
  5. Step 5: Solve for x
    x = 276,423,154.06/18,423.81
  6. Step 6: Final answer
    x = 15,003.58

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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.