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Finding the Fourth Proportional to 30,354.40, 45,531.60 and 28,021.60

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Solution

The fourth proportional to 30,354.40, 45,531.60 and 28,021.60 is: 42,032.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,354.40 : 45,531.60 = 28,021.60 : x
  2. Step 2: Convert to fraction form
    30,354.40/45,531.60 = 28,021.60/x
  3. Step 3: Cross multiply
    30,354.40x = 45,531.60 × 28,021.60
  4. Step 4: Simplify right side
    30,354.40x = 1,275,868,282.56
  5. Step 5: Solve for x
    x = 1,275,868,282.56/30,354.40
  6. Step 6: Final answer
    x = 42,032.40

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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.