Home / 15,015.28-20,721.15-8,300.89

Finding the Fourth Proportional to 15,015.28, 20,721.15 and 8,300.89

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Solution

The fourth proportional to 15,015.28, 20,721.15 and 8,300.89 is: 11,455.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,015.28 : 20,721.15 = 8,300.89 : x
  2. Step 2: Convert to fraction form
    15,015.28/20,721.15 = 8,300.89/x
  3. Step 3: Cross multiply
    15,015.28x = 20,721.15 × 8,300.89
  4. Step 4: Simplify right side
    15,015.28x = 172,003,986.82
  5. Step 5: Solve for x
    x = 172,003,986.82/15,015.28
  6. Step 6: Final answer
    x = 11,455.26

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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.