Home / 15,401.77-21,254.44-8,687.38

Finding the Fourth Proportional to 15,401.77, 21,254.44 and 8,687.38

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Solution

The fourth proportional to 15,401.77, 21,254.44 and 8,687.38 is: 11,988.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,401.77 : 21,254.44 = 8,687.38 : x
  2. Step 2: Convert to fraction form
    15,401.77/21,254.44 = 8,687.38/x
  3. Step 3: Cross multiply
    15,401.77x = 21,254.44 × 8,687.38
  4. Step 4: Simplify right side
    15,401.77x = 184,645,396.97
  5. Step 5: Solve for x
    x = 184,645,396.97/15,401.77
  6. Step 6: Final answer
    x = 11,988.58

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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.