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Finding the Fourth Proportional to 14,912.70, 20,580.08 and 8,540.28

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Solution

The fourth proportional to 14,912.70, 20,580.08 and 8,540.28 is: 11,785.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,912.70 : 20,580.08 = 8,540.28 : x
  2. Step 2: Convert to fraction form
    14,912.70/20,580.08 = 8,540.28/x
  3. Step 3: Cross multiply
    14,912.70x = 20,580.08 × 8,540.28
  4. Step 4: Simplify right side
    14,912.70x = 175,759,602.92
  5. Step 5: Solve for x
    x = 175,759,602.92/14,912.70
  6. Step 6: Final answer
    x = 11,785.90

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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.