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Finding the Fourth Proportional to 7,181.10, 9,909 and 4,036.68

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Solution

The fourth proportional to 7,181.10, 9,909 and 4,036.68 is: 5,570.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,181.10 : 9,909 = 4,036.68 : x
  2. Step 2: Convert to fraction form
    7,181.10/9,909 = 4,036.68/x
  3. Step 3: Cross multiply
    7,181.10x = 9,909 × 4,036.68
  4. Step 4: Simplify right side
    7,181.10x = 39,999,462.12
  5. Step 5: Solve for x
    x = 39,999,462.12/7,181.10
  6. Step 6: Final answer
    x = 5,570.10

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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.