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Finding the Fourth Proportional to 18,356.19, 25,331.55 and 10,904.19

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Solution

The fourth proportional to 18,356.19, 25,331.55 and 10,904.19 is: 15,047.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,356.19 : 25,331.55 = 10,904.19 : x
  2. Step 2: Convert to fraction form
    18,356.19/25,331.55 = 10,904.19/x
  3. Step 3: Cross multiply
    18,356.19x = 25,331.55 × 10,904.19
  4. Step 4: Simplify right side
    18,356.19x = 276,219,979.67
  5. Step 5: Solve for x
    x = 276,219,979.67/18,356.19
  6. Step 6: Final answer
    x = 15,047.78

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Double scale
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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.