Home / 20,929.02-31,388.66-7,787.58

Finding the Fourth Proportional to 20,929.02, 31,388.66 and 7,787.58

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Solution

The fourth proportional to 20,929.02, 31,388.66 and 7,787.58 is: 11,679.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,929.02 : 31,388.66 = 7,787.58 : x
  2. Step 2: Convert to fraction form
    20,929.02/31,388.66 = 7,787.58/x
  3. Step 3: Cross multiply
    20,929.02x = 31,388.66 × 7,787.58
  4. Step 4: Simplify right side
    20,929.02x = 244,441,700.84
  5. Step 5: Solve for x
    x = 244,441,700.84/20,929.02
  6. Step 6: Final answer
    x = 11,679.56

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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.