Home / 14,915.56-20,583.12-8,109.40

Finding the Fourth Proportional to 14,915.56, 20,583.12 and 8,109.40

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Solution

The fourth proportional to 14,915.56, 20,583.12 and 8,109.40 is: 11,190.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,915.56 : 20,583.12 = 8,109.40 : x
  2. Step 2: Convert to fraction form
    14,915.56/20,583.12 = 8,109.40/x
  3. Step 3: Cross multiply
    14,915.56x = 20,583.12 × 8,109.40
  4. Step 4: Simplify right side
    14,915.56x = 166,916,753.33
  5. Step 5: Solve for x
    x = 166,916,753.33/14,915.56
  6. Step 6: Final answer
    x = 11,190.78

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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.