Home / 19,815.81-27,345.09-11,857.56

Finding the Fourth Proportional to 19,815.81, 27,345.09 and 11,857.56

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Solution

The fourth proportional to 19,815.81, 27,345.09 and 11,857.56 is: 16,363.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,815.81 : 27,345.09 = 11,857.56 : x
  2. Step 2: Convert to fraction form
    19,815.81/27,345.09 = 11,857.56/x
  3. Step 3: Cross multiply
    19,815.81x = 27,345.09 × 11,857.56
  4. Step 4: Simplify right side
    19,815.81x = 324,246,045.38
  5. Step 5: Solve for x
    x = 324,246,045.38/19,815.81
  6. Step 6: Final answer
    x = 16,363.00

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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.