Home / 19,988.35-27,580.97-11,490.83

Finding the Fourth Proportional to 19,988.35, 27,580.97 and 11,490.83

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Solution

The fourth proportional to 19,988.35, 27,580.97 and 11,490.83 is: 15,855.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,988.35 : 27,580.97 = 11,490.83 : x
  2. Step 2: Convert to fraction form
    19,988.35/27,580.97 = 11,490.83/x
  3. Step 3: Cross multiply
    19,988.35x = 27,580.97 × 11,490.83
  4. Step 4: Simplify right side
    19,988.35x = 316,928,335.18
  5. Step 5: Solve for x
    x = 316,928,335.18/19,988.35
  6. Step 6: Final answer
    x = 15,855.65

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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.