Home / 20,800.19-31,173.48-18,120.95

Finding the Fourth Proportional to 20,800.19, 31,173.48 and 18,120.95

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Solution

The fourth proportional to 20,800.19, 31,173.48 and 18,120.95 is: 27,158.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,800.19 : 31,173.48 = 18,120.95 : x
  2. Step 2: Convert to fraction form
    20,800.19/31,173.48 = 18,120.95/x
  3. Step 3: Cross multiply
    20,800.19x = 31,173.48 × 18,120.95
  4. Step 4: Simplify right side
    20,800.19x = 564,893,018.65
  5. Step 5: Solve for x
    x = 564,893,018.65/20,800.19
  6. Step 6: Final answer
    x = 27,158.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.