Home / 10,919.79-15,065.61-6,669.30

Finding the Fourth Proportional to 10,919.79, 15,065.61 and 6,669.30

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Solution

The fourth proportional to 10,919.79, 15,065.61 and 6,669.30 is: 9,201.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,919.79 : 15,065.61 = 6,669.30 : x
  2. Step 2: Convert to fraction form
    10,919.79/15,065.61 = 6,669.30/x
  3. Step 3: Cross multiply
    10,919.79x = 15,065.61 × 6,669.30
  4. Step 4: Simplify right side
    10,919.79x = 100,477,072.77
  5. Step 5: Solve for x
    x = 100,477,072.77/10,919.79
  6. Step 6: Final answer
    x = 9,201.37

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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.