Home / 15,438.26-21,305.64-8,724.18

Finding the Fourth Proportional to 15,438.26, 21,305.64 and 8,724.18

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Solution

The fourth proportional to 15,438.26, 21,305.64 and 8,724.18 is: 12,039.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,438.26 : 21,305.64 = 8,724.18 : x
  2. Step 2: Convert to fraction form
    15,438.26/21,305.64 = 8,724.18/x
  3. Step 3: Cross multiply
    15,438.26x = 21,305.64 × 8,724.18
  4. Step 4: Simplify right side
    15,438.26x = 185,874,238.38
  5. Step 5: Solve for x
    x = 185,874,238.38/15,438.26
  6. Step 6: Final answer
    x = 12,039.84

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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.