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Finding the Fourth Proportional to 18,812.54, 25,964.06 and 10,853.20

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Solution

The fourth proportional to 18,812.54, 25,964.06 and 10,853.20 is: 14,979.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,812.54 : 25,964.06 = 10,853.20 : x
  2. Step 2: Convert to fraction form
    18,812.54/25,964.06 = 10,853.20/x
  3. Step 3: Cross multiply
    18,812.54x = 25,964.06 × 10,853.20
  4. Step 4: Simplify right side
    18,812.54x = 281,793,135.99
  5. Step 5: Solve for x
    x = 281,793,135.99/18,812.54
  6. Step 6: Final answer
    x = 14,979.01

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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.