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Finding the Fourth Proportional to 7,190.76, 9,921.31 and 4,207.33

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Solution

The fourth proportional to 7,190.76, 9,921.31 and 4,207.33 is: 5,804.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,190.76 : 9,921.31 = 4,207.33 : x
  2. Step 2: Convert to fraction form
    7,190.76/9,921.31 = 4,207.33/x
  3. Step 3: Cross multiply
    7,190.76x = 9,921.31 × 4,207.33
  4. Step 4: Simplify right side
    7,190.76x = 41,742,225.20
  5. Step 5: Solve for x
    x = 41,742,225.20/7,190.76
  6. Step 6: Final answer
    x = 5,804.98

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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.