Home / 19,121.40-28,690.20-9,255.60

Finding the Fourth Proportional to 19,121.40, 28,690.20 and 9,255.60

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Solution

The fourth proportional to 19,121.40, 28,690.20 and 9,255.60 is: 13,887.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,121.40 : 28,690.20 = 9,255.60 : x
  2. Step 2: Convert to fraction form
    19,121.40/28,690.20 = 9,255.60/x
  3. Step 3: Cross multiply
    19,121.40x = 28,690.20 × 9,255.60
  4. Step 4: Simplify right side
    19,121.40x = 265,545,015.12
  5. Step 5: Solve for x
    x = 265,545,015.12/19,121.40
  6. Step 6: Final answer
    x = 13,887.32

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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.