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Finding the Fourth Proportional to 14,989.97, 20,688.60 and 8,940.98

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Solution

The fourth proportional to 14,989.97, 20,688.60 and 8,940.98 is: 12,340.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,989.97 : 20,688.60 = 8,940.98 : x
  2. Step 2: Convert to fraction form
    14,989.97/20,688.60 = 8,940.98/x
  3. Step 3: Cross multiply
    14,989.97x = 20,688.60 × 8,940.98
  4. Step 4: Simplify right side
    14,989.97x = 184,976,255.39
  5. Step 5: Solve for x
    x = 184,976,255.39/14,989.97
  6. Step 6: Final answer
    x = 12,340.01

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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.