Home / 20,922.89-31,357.64-9,805.05

Finding the Fourth Proportional to 20,922.89, 31,357.64 and 9,805.05

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Solution

The fourth proportional to 20,922.89, 31,357.64 and 9,805.05 is: 14,695.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,922.89 : 31,357.64 = 9,805.05 : x
  2. Step 2: Convert to fraction form
    20,922.89/31,357.64 = 9,805.05/x
  3. Step 3: Cross multiply
    20,922.89x = 31,357.64 × 9,805.05
  4. Step 4: Simplify right side
    20,922.89x = 307,463,252.59
  5. Step 5: Solve for x
    x = 307,463,252.59/20,922.89
  6. Step 6: Final answer
    x = 14,695.07

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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.