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Finding the Fourth Proportional to 11,703.60, 16,150.80 and 6,987

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Solution

The fourth proportional to 11,703.60, 16,150.80 and 6,987 is: 9,641.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,703.60 : 16,150.80 = 6,987 : x
  2. Step 2: Convert to fraction form
    11,703.60/16,150.80 = 6,987/x
  3. Step 3: Cross multiply
    11,703.60x = 16,150.80 × 6,987
  4. Step 4: Simplify right side
    11,703.60x = 112,845,639.60
  5. Step 5: Solve for x
    x = 112,845,639.60/11,703.60
  6. Step 6: Final answer
    x = 9,641.96

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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.