Home / 15,126.39-20,874.78-8,412.30

Finding the Fourth Proportional to 15,126.39, 20,874.78 and 8,412.30

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Solution

The fourth proportional to 15,126.39, 20,874.78 and 8,412.30 is: 11,609.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,126.39 : 20,874.78 = 8,412.30 : x
  2. Step 2: Convert to fraction form
    15,126.39/20,874.78 = 8,412.30/x
  3. Step 3: Cross multiply
    15,126.39x = 20,874.78 × 8,412.30
  4. Step 4: Simplify right side
    15,126.39x = 175,604,911.79
  5. Step 5: Solve for x
    x = 175,604,911.79/15,126.39
  6. Step 6: Final answer
    x = 11,609.18

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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.