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Finding the Fourth Proportional to 18,388.59, 25,376.39 and 10,005.09

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Solution

The fourth proportional to 18,388.59, 25,376.39 and 10,005.09 is: 13,807.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,388.59 : 25,376.39 = 10,005.09 : x
  2. Step 2: Convert to fraction form
    18,388.59/25,376.39 = 10,005.09/x
  3. Step 3: Cross multiply
    18,388.59x = 25,376.39 × 10,005.09
  4. Step 4: Simplify right side
    18,388.59x = 253,893,015.80
  5. Step 5: Solve for x
    x = 253,893,015.80/18,388.59
  6. Step 6: Final answer
    x = 13,807.10

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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.