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Finding the Fourth Proportional to 28,781.70, 43,125.03 and 13,164.90

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Solution

The fourth proportional to 28,781.70, 43,125.03 and 13,164.90 is: 19,725.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,781.70 : 43,125.03 = 13,164.90 : x
  2. Step 2: Convert to fraction form
    28,781.70/43,125.03 = 13,164.90/x
  3. Step 3: Cross multiply
    28,781.70x = 43,125.03 × 13,164.90
  4. Step 4: Simplify right side
    28,781.70x = 567,736,707.45
  5. Step 5: Solve for x
    x = 567,736,707.45/28,781.70
  6. Step 6: Final answer
    x = 19,725.61

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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.