Home / 20,787.36-31,180.95-5,204.94

Finding the Fourth Proportional to 20,787.36, 31,180.95 and 5,204.94

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Solution

The fourth proportional to 20,787.36, 31,180.95 and 5,204.94 is: 7,807.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,787.36 : 31,180.95 = 5,204.94 : x
  2. Step 2: Convert to fraction form
    20,787.36/31,180.95 = 5,204.94/x
  3. Step 3: Cross multiply
    20,787.36x = 31,180.95 × 5,204.94
  4. Step 4: Simplify right side
    20,787.36x = 162,294,973.89
  5. Step 5: Solve for x
    x = 162,294,973.89/20,787.36
  6. Step 6: Final answer
    x = 7,807.39

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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.