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Finding the Fourth Proportional to 18,423.72, 25,424.76 and 10,040.20

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Solution

The fourth proportional to 18,423.72, 25,424.76 and 10,040.20 is: 13,855.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,423.72 : 25,424.76 = 10,040.20 : x
  2. Step 2: Convert to fraction form
    18,423.72/25,424.76 = 10,040.20/x
  3. Step 3: Cross multiply
    18,423.72x = 25,424.76 × 10,040.20
  4. Step 4: Simplify right side
    18,423.72x = 255,269,675.35
  5. Step 5: Solve for x
    x = 255,269,675.35/18,423.72
  6. Step 6: Final answer
    x = 13,855.49

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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.