Home / 27,855.11-38,442.09-15,918.20

Finding the Fourth Proportional to 27,855.11, 38,442.09 and 15,918.20

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Solution

The fourth proportional to 27,855.11, 38,442.09 and 15,918.20 is: 21,968.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,855.11 : 38,442.09 = 15,918.20 : x
  2. Step 2: Convert to fraction form
    27,855.11/38,442.09 = 15,918.20/x
  3. Step 3: Cross multiply
    27,855.11x = 38,442.09 × 15,918.20
  4. Step 4: Simplify right side
    27,855.11x = 611,928,877.04
  5. Step 5: Solve for x
    x = 611,928,877.04/27,855.11
  6. Step 6: Final answer
    x = 21,968.28

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Half scale
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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.