Home / 20,784.73-31,178.02-7,629.92

Finding the Fourth Proportional to 20,784.73, 31,178.02 and 7,629.92

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Solution

The fourth proportional to 20,784.73, 31,178.02 and 7,629.92 is: 11,445.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,784.73 : 31,178.02 = 7,629.92 : x
  2. Step 2: Convert to fraction form
    20,784.73/31,178.02 = 7,629.92/x
  3. Step 3: Cross multiply
    20,784.73x = 31,178.02 × 7,629.92
  4. Step 4: Simplify right side
    20,784.73x = 237,885,857.23
  5. Step 5: Solve for x
    x = 237,885,857.23/20,784.73
  6. Step 6: Final answer
    x = 11,445.22

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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.