Home / 21,160.51-31,730.82-7,824.29

Finding the Fourth Proportional to 21,160.51, 31,730.82 and 7,824.29

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Solution

The fourth proportional to 21,160.51, 31,730.82 and 7,824.29 is: 11,732.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,160.51 : 31,730.82 = 7,824.29 : x
  2. Step 2: Convert to fraction form
    21,160.51/31,730.82 = 7,824.29/x
  3. Step 3: Cross multiply
    21,160.51x = 31,730.82 × 7,824.29
  4. Step 4: Simplify right side
    21,160.51x = 248,271,128.11
  5. Step 5: Solve for x
    x = 248,271,128.11/21,160.51
  6. Step 6: Final answer
    x = 11,732.76

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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.