Home / 9,915.12-13,684.38-6,331.62

Finding the Fourth Proportional to 9,915.12, 13,684.38 and 6,331.62

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Solution

The fourth proportional to 9,915.12, 13,684.38 and 6,331.62 is: 8,738.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,915.12 : 13,684.38 = 6,331.62 : x
  2. Step 2: Convert to fraction form
    9,915.12/13,684.38 = 6,331.62/x
  3. Step 3: Cross multiply
    9,915.12x = 13,684.38 × 6,331.62
  4. Step 4: Simplify right side
    9,915.12x = 86,644,294.10
  5. Step 5: Solve for x
    x = 86,644,294.10/9,915.12
  6. Step 6: Final answer
    x = 8,738.60

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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.