Home / 10,308.39-15,440.70-6,978.69

Finding the Fourth Proportional to 10,308.39, 15,440.70 and 6,978.69

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Solution

The fourth proportional to 10,308.39, 15,440.70 and 6,978.69 is: 10,453.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,308.39 : 15,440.70 = 6,978.69 : x
  2. Step 2: Convert to fraction form
    10,308.39/15,440.70 = 6,978.69/x
  3. Step 3: Cross multiply
    10,308.39x = 15,440.70 × 6,978.69
  4. Step 4: Simplify right side
    10,308.39x = 107,755,858.68
  5. Step 5: Solve for x
    x = 107,755,858.68/10,308.39
  6. Step 6: Final answer
    x = 10,453.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.