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Finding the Fourth Proportional to 8,716, 12,028.08 and 4,990.72

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Solution

The fourth proportional to 8,716, 12,028.08 and 4,990.72 is: 6,887.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,716 : 12,028.08 = 4,990.72 : x
  2. Step 2: Convert to fraction form
    8,716/12,028.08 = 4,990.72/x
  3. Step 3: Cross multiply
    8,716x = 12,028.08 × 4,990.72
  4. Step 4: Simplify right side
    8,716x = 60,028,779.42
  5. Step 5: Solve for x
    x = 60,028,779.42/8,716
  6. Step 6: Final answer
    x = 6,887.19

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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.