Home / 11,728.79-16,186.11-6,423.90

Finding the Fourth Proportional to 11,728.79, 16,186.11 and 6,423.90

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Solution

The fourth proportional to 11,728.79, 16,186.11 and 6,423.90 is: 8,865.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,728.79 : 16,186.11 = 6,423.90 : x
  2. Step 2: Convert to fraction form
    11,728.79/16,186.11 = 6,423.90/x
  3. Step 3: Cross multiply
    11,728.79x = 16,186.11 × 6,423.90
  4. Step 4: Simplify right side
    11,728.79x = 103,977,915.42
  5. Step 5: Solve for x
    x = 103,977,915.42/11,728.79
  6. Step 6: Final answer
    x = 8,865.19

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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.