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Finding the Fourth Proportional to 14,991, 20,687.58 and 8,707.02

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Solution

The fourth proportional to 14,991, 20,687.58 and 8,707.02 is: 12,015.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,991 : 20,687.58 = 8,707.02 : x
  2. Step 2: Convert to fraction form
    14,991/20,687.58 = 8,707.02/x
  3. Step 3: Cross multiply
    14,991x = 20,687.58 × 8,707.02
  4. Step 4: Simplify right side
    14,991x = 180,127,172.81
  5. Step 5: Solve for x
    x = 180,127,172.81/14,991
  6. Step 6: Final answer
    x = 12,015.69

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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.