Home / 20,774.81-28,669.34-11,343.38

Finding the Fourth Proportional to 20,774.81, 28,669.34 and 11,343.38

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Solution

The fourth proportional to 20,774.81, 28,669.34 and 11,343.38 is: 15,653.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,774.81 : 28,669.34 = 11,343.38 : x
  2. Step 2: Convert to fraction form
    20,774.81/28,669.34 = 11,343.38/x
  3. Step 3: Cross multiply
    20,774.81x = 28,669.34 × 11,343.38
  4. Step 4: Simplify right side
    20,774.81x = 325,207,102.98
  5. Step 5: Solve for x
    x = 325,207,102.98/20,774.81
  6. Step 6: Final answer
    x = 15,653.91

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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.