Home / 13,915.96-20,880.68-6,123.76

Finding the Fourth Proportional to 13,915.96, 20,880.68 and 6,123.76

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Solution

The fourth proportional to 13,915.96, 20,880.68 and 6,123.76 is: 9,188.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,915.96 : 20,880.68 = 6,123.76 : x
  2. Step 2: Convert to fraction form
    13,915.96/20,880.68 = 6,123.76/x
  3. Step 3: Cross multiply
    13,915.96x = 20,880.68 × 6,123.76
  4. Step 4: Simplify right side
    13,915.96x = 127,868,272.96
  5. Step 5: Solve for x
    x = 127,868,272.96/13,915.96
  6. Step 6: Final answer
    x = 9,188.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.