Home / 15,579.96-21,500.37-9,990.96

Finding the Fourth Proportional to 15,579.96, 21,500.37 and 9,990.96

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Solution

The fourth proportional to 15,579.96, 21,500.37 and 9,990.96 is: 13,787.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,579.96 : 21,500.37 = 9,990.96 : x
  2. Step 2: Convert to fraction form
    15,579.96/21,500.37 = 9,990.96/x
  3. Step 3: Cross multiply
    15,579.96x = 21,500.37 × 9,990.96
  4. Step 4: Simplify right side
    15,579.96x = 214,809,336.66
  5. Step 5: Solve for x
    x = 214,809,336.66/15,579.96
  6. Step 6: Final answer
    x = 13,787.54

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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.