Home / 18,983.99-28,485.36-9,131.55

Finding the Fourth Proportional to 18,983.99, 28,485.36 and 9,131.55

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Solution

The fourth proportional to 18,983.99, 28,485.36 and 9,131.55 is: 13,701.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,983.99 : 28,485.36 = 9,131.55 : x
  2. Step 2: Convert to fraction form
    18,983.99/28,485.36 = 9,131.55/x
  3. Step 3: Cross multiply
    18,983.99x = 28,485.36 × 9,131.55
  4. Step 4: Simplify right side
    18,983.99x = 260,115,489.11
  5. Step 5: Solve for x
    x = 260,115,489.11/18,983.99
  6. Step 6: Final answer
    x = 13,701.84

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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.