Home / 15,015.31-20,721.51-8,301.04

Finding the Fourth Proportional to 15,015.31, 20,721.51 and 8,301.04

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Solution

The fourth proportional to 15,015.31, 20,721.51 and 8,301.04 is: 11,455.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,015.31 : 20,721.51 = 8,301.04 : x
  2. Step 2: Convert to fraction form
    15,015.31/20,721.51 = 8,301.04/x
  3. Step 3: Cross multiply
    15,015.31x = 20,721.51 × 8,301.04
  4. Step 4: Simplify right side
    15,015.31x = 172,010,083.37
  5. Step 5: Solve for x
    x = 172,010,083.37/15,015.31
  6. Step 6: Final answer
    x = 11,455.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.