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Finding the Fourth Proportional to 7,605.51, 10,419.36 and 7,321.22

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Solution

The fourth proportional to 7,605.51, 10,419.36 and 7,321.22 is: 10,029.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,605.51 : 10,419.36 = 7,321.22 : x
  2. Step 2: Convert to fraction form
    7,605.51/10,419.36 = 7,321.22/x
  3. Step 3: Cross multiply
    7,605.51x = 10,419.36 × 7,321.22
  4. Step 4: Simplify right side
    7,605.51x = 76,282,426.82
  5. Step 5: Solve for x
    x = 76,282,426.82/7,605.51
  6. Step 6: Final answer
    x = 10,029.89

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.