Home / 15,429.15-21,292.31-8,355.60

Finding the Fourth Proportional to 15,429.15, 21,292.31 and 8,355.60

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Solution

The fourth proportional to 15,429.15, 21,292.31 and 8,355.60 is: 11,530.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,429.15 : 21,292.31 = 8,355.60 : x
  2. Step 2: Convert to fraction form
    15,429.15/21,292.31 = 8,355.60/x
  3. Step 3: Cross multiply
    15,429.15x = 21,292.31 × 8,355.60
  4. Step 4: Simplify right side
    15,429.15x = 177,910,025.44
  5. Step 5: Solve for x
    x = 177,910,025.44/15,429.15
  6. Step 6: Final answer
    x = 11,530.77

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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.