Home / 7,190.07-9,920.80-4,205.31

Finding the Fourth Proportional to 7,190.07, 9,920.80 and 4,205.31

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Solution

The fourth proportional to 7,190.07, 9,920.80 and 4,205.31 is: 5,802.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,190.07 : 9,920.80 = 4,205.31 : x
  2. Step 2: Convert to fraction form
    7,190.07/9,920.80 = 4,205.31/x
  3. Step 3: Cross multiply
    7,190.07x = 9,920.80 × 4,205.31
  4. Step 4: Simplify right side
    7,190.07x = 41,720,039.45
  5. Step 5: Solve for x
    x = 41,720,039.45/7,190.07
  6. Step 6: Final answer
    x = 5,802.45

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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.