Home / 20,805.18-31,180.58-18,166.02

Finding the Fourth Proportional to 20,805.18, 31,180.58 and 18,166.02

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Solution

The fourth proportional to 20,805.18, 31,180.58 and 18,166.02 is: 27,225.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,805.18 : 31,180.58 = 18,166.02 : x
  2. Step 2: Convert to fraction form
    20,805.18/31,180.58 = 18,166.02/x
  3. Step 3: Cross multiply
    20,805.18x = 31,180.58 × 18,166.02
  4. Step 4: Simplify right side
    20,805.18x = 566,427,039.89
  5. Step 5: Solve for x
    x = 566,427,039.89/20,805.18
  6. Step 6: Final answer
    x = 27,225.29

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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.