Home / 13,751,920.50-18,978,240.78-7,640,349

Finding the Fourth Proportional to 13,751,920.50, 18,978,240.78 and 7,640,349

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Solution

The fourth proportional to 13,751,920.50, 18,978,240.78 and 7,640,349 is: 10,544,009.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,751,920.50 : 18,978,240.78 = 7,640,349 : x
  2. Step 2: Convert to fraction form
    13,751,920.50/18,978,240.78 = 7,640,349/x
  3. Step 3: Cross multiply
    13,751,920.50x = 18,978,240.78 × 7,640,349
  4. Step 4: Simplify right side
    13,751,920.50x = 145,000,382,965,232.22
  5. Step 5: Solve for x
    x = 145,000,382,965,232.22/13,751,920.50
  6. Step 6: Final answer
    x = 10,544,009.69

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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.