Home / 20,130.62-27,780.45-11,745.50

Finding the Fourth Proportional to 20,130.62, 27,780.45 and 11,745.50

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Solution

The fourth proportional to 20,130.62, 27,780.45 and 11,745.50 is: 16,208.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,130.62 : 27,780.45 = 11,745.50 : x
  2. Step 2: Convert to fraction form
    20,130.62/27,780.45 = 11,745.50/x
  3. Step 3: Cross multiply
    20,130.62x = 27,780.45 × 11,745.50
  4. Step 4: Simplify right side
    20,130.62x = 326,295,275.48
  5. Step 5: Solve for x
    x = 326,295,275.48/20,130.62
  6. Step 6: Final answer
    x = 16,208.90

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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.