Home / 12,219.36-18,319.20-5,289.12

Finding the Fourth Proportional to 12,219.36, 18,319.20 and 5,289.12

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Solution

The fourth proportional to 12,219.36, 18,319.20 and 5,289.12 is: 7,929.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,219.36 : 18,319.20 = 5,289.12 : x
  2. Step 2: Convert to fraction form
    12,219.36/18,319.20 = 5,289.12/x
  3. Step 3: Cross multiply
    12,219.36x = 18,319.20 × 5,289.12
  4. Step 4: Simplify right side
    12,219.36x = 96,892,447.10
  5. Step 5: Solve for x
    x = 96,892,447.10/12,219.36
  6. Step 6: Final answer
    x = 7,929.42

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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.