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Finding the Fourth Proportional to 30,420.80, 45,609.60 and 11,693.60

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Solution

The fourth proportional to 30,420.80, 45,609.60 and 11,693.60 is: 17,532.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,420.80 : 45,609.60 = 11,693.60 : x
  2. Step 2: Convert to fraction form
    30,420.80/45,609.60 = 11,693.60/x
  3. Step 3: Cross multiply
    30,420.80x = 45,609.60 × 11,693.60
  4. Step 4: Simplify right side
    30,420.80x = 533,340,418.56
  5. Step 5: Solve for x
    x = 533,340,418.56/30,420.80
  6. Step 6: Final answer
    x = 17,532.10

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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.