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Finding the Fourth Proportional to 11,689.93, 16,128.11 and 6,652.89

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Solution

The fourth proportional to 11,689.93, 16,128.11 and 6,652.89 is: 9,178.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,689.93 : 16,128.11 = 6,652.89 : x
  2. Step 2: Convert to fraction form
    11,689.93/16,128.11 = 6,652.89/x
  3. Step 3: Cross multiply
    11,689.93x = 16,128.11 × 6,652.89
  4. Step 4: Simplify right side
    11,689.93x = 107,298,490.71
  5. Step 5: Solve for x
    x = 107,298,490.71/11,689.93
  6. Step 6: Final answer
    x = 9,178.71

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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.