Home / 20,863.63-31,295.58-5,281.25

Finding the Fourth Proportional to 20,863.63, 31,295.58 and 5,281.25

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Solution

The fourth proportional to 20,863.63, 31,295.58 and 5,281.25 is: 7,921.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,863.63 : 31,295.58 = 5,281.25 : x
  2. Step 2: Convert to fraction form
    20,863.63/31,295.58 = 5,281.25/x
  3. Step 3: Cross multiply
    20,863.63x = 31,295.58 × 5,281.25
  4. Step 4: Simplify right side
    20,863.63x = 165,279,840.31
  5. Step 5: Solve for x
    x = 165,279,840.31/20,863.63
  6. Step 6: Final answer
    x = 7,921.91

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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.