Home / 20,972.64-31,432.62-12,545.36

Finding the Fourth Proportional to 20,972.64, 31,432.62 and 12,545.36

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Solution

The fourth proportional to 20,972.64, 31,432.62 and 12,545.36 is: 18,802.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,972.64 : 31,432.62 = 12,545.36 : x
  2. Step 2: Convert to fraction form
    20,972.64/31,432.62 = 12,545.36/x
  3. Step 3: Cross multiply
    20,972.64x = 31,432.62 × 12,545.36
  4. Step 4: Simplify right side
    20,972.64x = 394,333,533.64
  5. Step 5: Solve for x
    x = 394,333,533.64/20,972.64
  6. Step 6: Final answer
    x = 18,802.28

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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.