Home / 15,318.72-21,138.86-8,604.17

Finding the Fourth Proportional to 15,318.72, 21,138.86 and 8,604.17

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Solution

The fourth proportional to 15,318.72, 21,138.86 and 8,604.17 is: 11,873.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,318.72 : 21,138.86 = 8,604.17 : x
  2. Step 2: Convert to fraction form
    15,318.72/21,138.86 = 8,604.17/x
  3. Step 3: Cross multiply
    15,318.72x = 21,138.86 × 8,604.17
  4. Step 4: Simplify right side
    15,318.72x = 181,882,196.33
  5. Step 5: Solve for x
    x = 181,882,196.33/15,318.72
  6. Step 6: Final answer
    x = 11,873.20

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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.