Home / 11,915.94-16,440.66-9,390.23

Finding the Fourth Proportional to 11,915.94, 16,440.66 and 9,390.23

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Solution

The fourth proportional to 11,915.94, 16,440.66 and 9,390.23 is: 12,955.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,915.94 : 16,440.66 = 9,390.23 : x
  2. Step 2: Convert to fraction form
    11,915.94/16,440.66 = 9,390.23/x
  3. Step 3: Cross multiply
    11,915.94x = 16,440.66 × 9,390.23
  4. Step 4: Simplify right side
    11,915.94x = 154,381,496.55
  5. Step 5: Solve for x
    x = 154,381,496.55/11,915.94
  6. Step 6: Final answer
    x = 12,955.88

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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.