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Finding the Fourth Proportional to 28,679.94, 43,019.91 and 11,153.87

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Solution

The fourth proportional to 28,679.94, 43,019.91 and 11,153.87 is: 16,730.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,679.94 : 43,019.91 = 11,153.87 : x
  2. Step 2: Convert to fraction form
    28,679.94/43,019.91 = 11,153.87/x
  3. Step 3: Cross multiply
    28,679.94x = 43,019.91 × 11,153.87
  4. Step 4: Simplify right side
    28,679.94x = 479,838,268.45
  5. Step 5: Solve for x
    x = 479,838,268.45/28,679.94
  6. Step 6: Final answer
    x = 16,730.80

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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.