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Finding the Fourth Proportional to 11,687.91, 16,130.18 and 6,653.76

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Solution

The fourth proportional to 11,687.91, 16,130.18 and 6,653.76 is: 9,182.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,687.91 : 16,130.18 = 6,653.76 : x
  2. Step 2: Convert to fraction form
    11,687.91/16,130.18 = 6,653.76/x
  3. Step 3: Cross multiply
    11,687.91x = 16,130.18 × 6,653.76
  4. Step 4: Simplify right side
    11,687.91x = 107,326,346.48
  5. Step 5: Solve for x
    x = 107,326,346.48/11,687.91
  6. Step 6: Final answer
    x = 9,182.68

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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.