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Finding the Fourth Proportional to 30,235.48, 45,321.90 and 21,894.64

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Solution

The fourth proportional to 30,235.48, 45,321.90 and 21,894.64 is: 32,819.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,235.48 : 45,321.90 = 21,894.64 : x
  2. Step 2: Convert to fraction form
    30,235.48/45,321.90 = 21,894.64/x
  3. Step 3: Cross multiply
    30,235.48x = 45,321.90 × 21,894.64
  4. Step 4: Simplify right side
    30,235.48x = 992,306,684.62
  5. Step 5: Solve for x
    x = 992,306,684.62/30,235.48
  6. Step 6: Final answer
    x = 32,819.28

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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.