Home / 20,808.88-31,213.72-9,712.56

Finding the Fourth Proportional to 20,808.88, 31,213.72 and 9,712.56

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Solution

The fourth proportional to 20,808.88, 31,213.72 and 9,712.56 is: 14,569.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,808.88 : 31,213.72 = 9,712.56 : x
  2. Step 2: Convert to fraction form
    20,808.88/31,213.72 = 9,712.56/x
  3. Step 3: Cross multiply
    20,808.88x = 31,213.72 × 9,712.56
  4. Step 4: Simplify right side
    20,808.88x = 303,165,128.32
  5. Step 5: Solve for x
    x = 303,165,128.32/20,808.88
  6. Step 6: Final answer
    x = 14,569.03

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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.