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Finding the Fourth Proportional to 9,991.49, 14,987.16 and 3,328.49

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Solution

The fourth proportional to 9,991.49, 14,987.16 and 3,328.49 is: 4,992.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,991.49 : 14,987.16 = 3,328.49 : x
  2. Step 2: Convert to fraction form
    9,991.49/14,987.16 = 3,328.49/x
  3. Step 3: Cross multiply
    9,991.49x = 14,987.16 × 3,328.49
  4. Step 4: Simplify right side
    9,991.49x = 49,884,649.66
  5. Step 5: Solve for x
    x = 49,884,649.66/9,991.49
  6. Step 6: Final answer
    x = 4,992.72

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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.