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Finding the Fourth Proportional to 13,969.52, 20,905.93 and 8,630.50

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Solution

The fourth proportional to 13,969.52, 20,905.93 and 8,630.50 is: 12,915.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,969.52 : 20,905.93 = 8,630.50 : x
  2. Step 2: Convert to fraction form
    13,969.52/20,905.93 = 8,630.50/x
  3. Step 3: Cross multiply
    13,969.52x = 20,905.93 × 8,630.50
  4. Step 4: Simplify right side
    13,969.52x = 180,428,628.87
  5. Step 5: Solve for x
    x = 180,428,628.87/13,969.52
  6. Step 6: Final answer
    x = 12,915.88

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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.