Home / 20,935.64-31,405.52-7,784.92

Finding the Fourth Proportional to 20,935.64, 31,405.52 and 7,784.92

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Solution

The fourth proportional to 20,935.64, 31,405.52 and 7,784.92 is: 11,678.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,935.64 : 31,405.52 = 7,784.92 : x
  2. Step 2: Convert to fraction form
    20,935.64/31,405.52 = 7,784.92/x
  3. Step 3: Cross multiply
    20,935.64x = 31,405.52 × 7,784.92
  4. Step 4: Simplify right side
    20,935.64x = 244,489,460.76
  5. Step 5: Solve for x
    x = 244,489,460.76/20,935.64
  6. Step 6: Final answer
    x = 11,678.15

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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.