Home / 20,949.85-31,435.02-9,857.64

Finding the Fourth Proportional to 20,949.85, 31,435.02 and 9,857.64

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Solution

The fourth proportional to 20,949.85, 31,435.02 and 9,857.64 is: 14,791.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,949.85 : 31,435.02 = 9,857.64 : x
  2. Step 2: Convert to fraction form
    20,949.85/31,435.02 = 9,857.64/x
  3. Step 3: Cross multiply
    20,949.85x = 31,435.02 × 9,857.64
  4. Step 4: Simplify right side
    20,949.85x = 309,875,061.26
  5. Step 5: Solve for x
    x = 309,875,061.26/20,949.85
  6. Step 6: Final answer
    x = 14,791.28

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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.