Home / 20,922.64-31,364.16-7,766.08

Finding the Fourth Proportional to 20,922.64, 31,364.16 and 7,766.08

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Solution

The fourth proportional to 20,922.64, 31,364.16 and 7,766.08 is: 11,641.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,922.64 : 31,364.16 = 7,766.08 : x
  2. Step 2: Convert to fraction form
    20,922.64/31,364.16 = 7,766.08/x
  3. Step 3: Cross multiply
    20,922.64x = 31,364.16 × 7,766.08
  4. Step 4: Simplify right side
    20,922.64x = 243,576,575.69
  5. Step 5: Solve for x
    x = 243,576,575.69/20,922.64
  6. Step 6: Final answer
    x = 11,641.77

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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.