Home / 12,207.20-18,289.20-11,429.60

Finding the Fourth Proportional to 12,207.20, 18,289.20 and 11,429.60

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Solution

The fourth proportional to 12,207.20, 18,289.20 and 11,429.60 is: 17,124.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,207.20 : 18,289.20 = 11,429.60 : x
  2. Step 2: Convert to fraction form
    12,207.20/18,289.20 = 11,429.60/x
  3. Step 3: Cross multiply
    12,207.20x = 18,289.20 × 11,429.60
  4. Step 4: Simplify right side
    12,207.20x = 209,038,240.32
  5. Step 5: Solve for x
    x = 209,038,240.32/12,207.20
  6. Step 6: Final answer
    x = 17,124.18

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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.