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Finding the Fourth Proportional to 8,291.55, 12,419.10 and 7,368.15

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Solution

The fourth proportional to 8,291.55, 12,419.10 and 7,368.15 is: 11,036.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,291.55 : 12,419.10 = 7,368.15 : x
  2. Step 2: Convert to fraction form
    8,291.55/12,419.10 = 7,368.15/x
  3. Step 3: Cross multiply
    8,291.55x = 12,419.10 × 7,368.15
  4. Step 4: Simplify right side
    8,291.55x = 91,505,791.67
  5. Step 5: Solve for x
    x = 91,505,791.67/8,291.55
  6. Step 6: Final answer
    x = 11,036.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.