Home / 15,724.37-21,699.51-8,919.69

Finding the Fourth Proportional to 15,724.37, 21,699.51 and 8,919.69

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Solution

The fourth proportional to 15,724.37, 21,699.51 and 8,919.69 is: 12,309.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,724.37 : 21,699.51 = 8,919.69 : x
  2. Step 2: Convert to fraction form
    15,724.37/21,699.51 = 8,919.69/x
  3. Step 3: Cross multiply
    15,724.37x = 21,699.51 × 8,919.69
  4. Step 4: Simplify right side
    15,724.37x = 193,552,787.53
  5. Step 5: Solve for x
    x = 193,552,787.53/15,724.37
  6. Step 6: Final answer
    x = 12,309.09

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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.