Home / 19,815.90-27,345.12-11,853.42

Finding the Fourth Proportional to 19,815.90, 27,345.12 and 11,853.42

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Solution

The fourth proportional to 19,815.90, 27,345.12 and 11,853.42 is: 16,357.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,815.90 : 27,345.12 = 11,853.42 : x
  2. Step 2: Convert to fraction form
    19,815.90/27,345.12 = 11,853.42/x
  3. Step 3: Cross multiply
    19,815.90x = 27,345.12 × 11,853.42
  4. Step 4: Simplify right side
    19,815.90x = 324,133,192.31
  5. Step 5: Solve for x
    x = 324,133,192.31/19,815.90
  6. Step 6: Final answer
    x = 16,357.23

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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.