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Finding the Fourth Proportional to 9,991.64, 14,987.52 and 4,443.68

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Solution

The fourth proportional to 9,991.64, 14,987.52 and 4,443.68 is: 6,665.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,991.64 : 14,987.52 = 4,443.68 : x
  2. Step 2: Convert to fraction form
    9,991.64/14,987.52 = 4,443.68/x
  3. Step 3: Cross multiply
    9,991.64x = 14,987.52 × 4,443.68
  4. Step 4: Simplify right side
    9,991.64x = 66,599,742.87
  5. Step 5: Solve for x
    x = 66,599,742.87/9,991.64
  6. Step 6: Final answer
    x = 6,665.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.