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Finding the Fourth Proportional to 8,291.13, 11,448.64 and 7,690.13

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Solution

The fourth proportional to 8,291.13, 11,448.64 and 7,690.13 is: 10,618.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,291.13 : 11,448.64 = 7,690.13 : x
  2. Step 2: Convert to fraction form
    8,291.13/11,448.64 = 7,690.13/x
  3. Step 3: Cross multiply
    8,291.13x = 11,448.64 × 7,690.13
  4. Step 4: Simplify right side
    8,291.13x = 88,041,557.42
  5. Step 5: Solve for x
    x = 88,041,557.42/8,291.13
  6. Step 6: Final answer
    x = 10,618.77

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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.