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Finding the Fourth Proportional to 14,002.86, 20,989.68 and 9,621.60

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Solution

The fourth proportional to 14,002.86, 20,989.68 and 9,621.60 is: 14,422.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,002.86 : 20,989.68 = 9,621.60 : x
  2. Step 2: Convert to fraction form
    14,002.86/20,989.68 = 9,621.60/x
  3. Step 3: Cross multiply
    14,002.86x = 20,989.68 × 9,621.60
  4. Step 4: Simplify right side
    14,002.86x = 201,954,305.09
  5. Step 5: Solve for x
    x = 201,954,305.09/14,002.86
  6. Step 6: Final answer
    x = 14,422.36

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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.