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Finding the Fourth Proportional to 18,399.92, 27,580.95 and 7,314.47

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Solution

The fourth proportional to 18,399.92, 27,580.95 and 7,314.47 is: 10,964.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,399.92 : 27,580.95 = 7,314.47 : x
  2. Step 2: Convert to fraction form
    18,399.92/27,580.95 = 7,314.47/x
  3. Step 3: Cross multiply
    18,399.92x = 27,580.95 × 7,314.47
  4. Step 4: Simplify right side
    18,399.92x = 201,739,929.58
  5. Step 5: Solve for x
    x = 201,739,929.58/18,399.92
  6. Step 6: Final answer
    x = 10,964.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.