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Finding the Fourth Proportional to 28,211.48, 38,914.13 and 18,152.99

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Solution

The fourth proportional to 28,211.48, 38,914.13 and 18,152.99 is: 25,039.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,211.48 : 38,914.13 = 18,152.99 : x
  2. Step 2: Convert to fraction form
    28,211.48/38,914.13 = 18,152.99/x
  3. Step 3: Cross multiply
    28,211.48x = 38,914.13 × 18,152.99
  4. Step 4: Simplify right side
    28,211.48x = 706,407,663.56
  5. Step 5: Solve for x
    x = 706,407,663.56/28,211.48
  6. Step 6: Final answer
    x = 25,039.73

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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.