Home / 13,258.87-18,292.66-8,221.28

Finding the Fourth Proportional to 13,258.87, 18,292.66 and 8,221.28

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Solution

The fourth proportional to 13,258.87, 18,292.66 and 8,221.28 is: 11,342.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,258.87 : 18,292.66 = 8,221.28 : x
  2. Step 2: Convert to fraction form
    13,258.87/18,292.66 = 8,221.28/x
  3. Step 3: Cross multiply
    13,258.87x = 18,292.66 × 8,221.28
  4. Step 4: Simplify right side
    13,258.87x = 150,388,967.79
  5. Step 5: Solve for x
    x = 150,388,967.79/13,258.87
  6. Step 6: Final answer
    x = 11,342.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.