Home / 18,317.85-27,478.64-4,991.12

Finding the Fourth Proportional to 18,317.85, 27,478.64 and 4,991.12

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Solution

The fourth proportional to 18,317.85, 27,478.64 and 4,991.12 is: 7,487.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,317.85 : 27,478.64 = 4,991.12 : x
  2. Step 2: Convert to fraction form
    18,317.85/27,478.64 = 4,991.12/x
  3. Step 3: Cross multiply
    18,317.85x = 27,478.64 × 4,991.12
  4. Step 4: Simplify right side
    18,317.85x = 137,149,167.81
  5. Step 5: Solve for x
    x = 137,149,167.81/18,317.85
  6. Step 6: Final answer
    x = 7,487.19

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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.