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Finding the Fourth Proportional to 8,653.74, 12,991.77 and 7,429.02

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Solution

The fourth proportional to 8,653.74, 12,991.77 and 7,429.02 is: 11,153.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,653.74 : 12,991.77 = 7,429.02 : x
  2. Step 2: Convert to fraction form
    8,653.74/12,991.77 = 7,429.02/x
  3. Step 3: Cross multiply
    8,653.74x = 12,991.77 × 7,429.02
  4. Step 4: Simplify right side
    8,653.74x = 96,516,119.17
  5. Step 5: Solve for x
    x = 96,516,119.17/8,653.74
  6. Step 6: Final answer
    x = 11,153.11

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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.