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Finding the Fourth Proportional to 30,400, 45,562.56 and 21,587.20

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Solution

The fourth proportional to 30,400, 45,562.56 and 21,587.20 is: 32,354.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,400 : 45,562.56 = 21,587.20 : x
  2. Step 2: Convert to fraction form
    30,400/45,562.56 = 21,587.20/x
  3. Step 3: Cross multiply
    30,400x = 45,562.56 × 21,587.20
  4. Step 4: Simplify right side
    30,400x = 983,568,095.23
  5. Step 5: Solve for x
    x = 983,568,095.23/30,400
  6. Step 6: Final answer
    x = 32,354.21

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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.