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Finding the Fourth Proportional to 9,090.81, 12,567.87 and 9,007.79

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Solution

The fourth proportional to 9,090.81, 12,567.87 and 9,007.79 is: 12,453.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,090.81 : 12,567.87 = 9,007.79 : x
  2. Step 2: Convert to fraction form
    9,090.81/12,567.87 = 9,007.79/x
  3. Step 3: Cross multiply
    9,090.81x = 12,567.87 × 9,007.79
  4. Step 4: Simplify right side
    9,090.81x = 113,208,670.87
  5. Step 5: Solve for x
    x = 113,208,670.87/9,090.81
  6. Step 6: Final answer
    x = 12,453.09

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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.