Home / 11,391.42-15,719.70-6,611.12

Finding the Fourth Proportional to 11,391.42, 15,719.70 and 6,611.12

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Solution

The fourth proportional to 11,391.42, 15,719.70 and 6,611.12 is: 9,123.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,391.42 : 15,719.70 = 6,611.12 : x
  2. Step 2: Convert to fraction form
    11,391.42/15,719.70 = 6,611.12/x
  3. Step 3: Cross multiply
    11,391.42x = 15,719.70 × 6,611.12
  4. Step 4: Simplify right side
    11,391.42x = 103,924,823.06
  5. Step 5: Solve for x
    x = 103,924,823.06/11,391.42
  6. Step 6: Final answer
    x = 9,123.08

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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.