Home / 27,712.72-38,243-15,775.80

Finding the Fourth Proportional to 27,712.72, 38,243 and 15,775.80

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Solution

The fourth proportional to 27,712.72, 38,243 and 15,775.80 is: 21,770.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,712.72 : 38,243 = 15,775.80 : x
  2. Step 2: Convert to fraction form
    27,712.72/38,243 = 15,775.80/x
  3. Step 3: Cross multiply
    27,712.72x = 38,243 × 15,775.80
  4. Step 4: Simplify right side
    27,712.72x = 603,313,919.40
  5. Step 5: Solve for x
    x = 603,313,919.40/27,712.72
  6. Step 6: Final answer
    x = 21,770.29

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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.