Home / 15,308.39-21,126.13-8,939.06

Finding the Fourth Proportional to 15,308.39, 21,126.13 and 8,939.06

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Solution

The fourth proportional to 15,308.39, 21,126.13 and 8,939.06 is: 12,336.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,308.39 : 21,126.13 = 8,939.06 : x
  2. Step 2: Convert to fraction form
    15,308.39/21,126.13 = 8,939.06/x
  3. Step 3: Cross multiply
    15,308.39x = 21,126.13 × 8,939.06
  4. Step 4: Simplify right side
    15,308.39x = 188,847,660.35
  5. Step 5: Solve for x
    x = 188,847,660.35/15,308.39
  6. Step 6: Final answer
    x = 12,336.22

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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.