Home / 20,772.81-31,166.51-12,972.51

Finding the Fourth Proportional to 20,772.81, 31,166.51 and 12,972.51

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Solution

The fourth proportional to 20,772.81, 31,166.51 and 12,972.51 is: 19,463.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,772.81 : 31,166.51 = 12,972.51 : x
  2. Step 2: Convert to fraction form
    20,772.81/31,166.51 = 12,972.51/x
  3. Step 3: Cross multiply
    20,772.81x = 31,166.51 × 12,972.51
  4. Step 4: Simplify right side
    20,772.81x = 404,307,862.64
  5. Step 5: Solve for x
    x = 404,307,862.64/20,772.81
  6. Step 6: Final answer
    x = 19,463.32

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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.