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Finding the Fourth Proportional to 30,467.80, 45,612.60 and 21,719.80

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Solution

The fourth proportional to 30,467.80, 45,612.60 and 21,719.80 is: 32,516.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,467.80 : 45,612.60 = 21,719.80 : x
  2. Step 2: Convert to fraction form
    30,467.80/45,612.60 = 21,719.80/x
  3. Step 3: Cross multiply
    30,467.80x = 45,612.60 × 21,719.80
  4. Step 4: Simplify right side
    30,467.80x = 990,696,549.48
  5. Step 5: Solve for x
    x = 990,696,549.48/30,467.80
  6. Step 6: Final answer
    x = 32,516.18

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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.