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Finding the Fourth Proportional to 30,388.60, 45,569.22 and 12,849.40

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Solution

The fourth proportional to 30,388.60, 45,569.22 and 12,849.40 is: 19,268.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,388.60 : 45,569.22 = 12,849.40 : x
  2. Step 2: Convert to fraction form
    30,388.60/45,569.22 = 12,849.40/x
  3. Step 3: Cross multiply
    30,388.60x = 45,569.22 × 12,849.40
  4. Step 4: Simplify right side
    30,388.60x = 585,537,135.47
  5. Step 5: Solve for x
    x = 585,537,135.47/30,388.60
  6. Step 6: Final answer
    x = 19,268.32

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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.