Home / 20,854.90-31,254.56-18,068.60

Finding the Fourth Proportional to 20,854.90, 31,254.56 and 18,068.60

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Solution

The fourth proportional to 20,854.90, 31,254.56 and 18,068.60 is: 27,078.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,854.90 : 31,254.56 = 18,068.60 : x
  2. Step 2: Convert to fraction form
    20,854.90/31,254.56 = 18,068.60/x
  3. Step 3: Cross multiply
    20,854.90x = 31,254.56 × 18,068.60
  4. Step 4: Simplify right side
    20,854.90x = 564,726,198.37
  5. Step 5: Solve for x
    x = 564,726,198.37/20,854.90
  6. Step 6: Final answer
    x = 27,078.82

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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.