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Finding the Fourth Proportional to 7,187.55, 9,918.81 and 4,043.75

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Solution

The fourth proportional to 7,187.55, 9,918.81 and 4,043.75 is: 5,580.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,187.55 : 9,918.81 = 4,043.75 : x
  2. Step 2: Convert to fraction form
    7,187.55/9,918.81 = 4,043.75/x
  3. Step 3: Cross multiply
    7,187.55x = 9,918.81 × 4,043.75
  4. Step 4: Simplify right side
    7,187.55x = 40,109,138.34
  5. Step 5: Solve for x
    x = 40,109,138.34/7,187.55
  6. Step 6: Final answer
    x = 5,580.36

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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.