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Finding the Fourth Proportional to 13,991.66, 20,987.49 and 4,629.16

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Solution

The fourth proportional to 13,991.66, 20,987.49 and 4,629.16 is: 6,943.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,991.66 : 20,987.49 = 4,629.16 : x
  2. Step 2: Convert to fraction form
    13,991.66/20,987.49 = 4,629.16/x
  3. Step 3: Cross multiply
    13,991.66x = 20,987.49 × 4,629.16
  4. Step 4: Simplify right side
    13,991.66x = 97,154,449.21
  5. Step 5: Solve for x
    x = 97,154,449.21/13,991.66
  6. Step 6: Final answer
    x = 6,943.74

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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.