Home / 10,669.32-15,999.93-5,121.09

Finding the Fourth Proportional to 10,669.32, 15,999.93 and 5,121.09

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Solution

The fourth proportional to 10,669.32, 15,999.93 and 5,121.09 is: 7,679.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,669.32 : 15,999.93 = 5,121.09 : x
  2. Step 2: Convert to fraction form
    10,669.32/15,999.93 = 5,121.09/x
  3. Step 3: Cross multiply
    10,669.32x = 15,999.93 × 5,121.09
  4. Step 4: Simplify right side
    10,669.32x = 81,937,081.52
  5. Step 5: Solve for x
    x = 81,937,081.52/10,669.32
  6. Step 6: Final answer
    x = 7,679.69

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1.5x scale

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.