Home / 15,678.38-21,636.10-8,604.79

Finding the Fourth Proportional to 15,678.38, 21,636.10 and 8,604.79

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Solution

The fourth proportional to 15,678.38, 21,636.10 and 8,604.79 is: 11,874.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,678.38 : 21,636.10 = 8,604.79 : x
  2. Step 2: Convert to fraction form
    15,678.38/21,636.10 = 8,604.79/x
  3. Step 3: Cross multiply
    15,678.38x = 21,636.10 × 8,604.79
  4. Step 4: Simplify right side
    15,678.38x = 186,174,096.92
  5. Step 5: Solve for x
    x = 186,174,096.92/15,678.38
  6. Step 6: Final answer
    x = 11,874.57

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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.