Home / 13,209,321.35-18,228,995.51-7,407,978.54

Finding the Fourth Proportional to 13,209,321.35, 18,228,995.51 and 7,407,978.54

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Solution

The fourth proportional to 13,209,321.35, 18,228,995.51 and 7,407,978.54 is: 10,223,084.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,209,321.35 : 18,228,995.51 = 7,407,978.54 : x
  2. Step 2: Convert to fraction form
    13,209,321.35/18,228,995.51 = 7,407,978.54/x
  3. Step 3: Cross multiply
    13,209,321.35x = 18,228,995.51 × 7,407,978.54
  4. Step 4: Simplify right side
    13,209,321.35x = 135,040,007,543,836.38
  5. Step 5: Solve for x
    x = 135,040,007,543,836.38/13,209,321.35
  6. Step 6: Final answer
    x = 10,223,084.44

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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.