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Finding the Fourth Proportional to 30,408.74, 45,582.59 and 12,615.20

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Solution

The fourth proportional to 30,408.74, 45,582.59 and 12,615.20 is: 18,910.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,408.74 : 45,582.59 = 12,615.20 : x
  2. Step 2: Convert to fraction form
    30,408.74/45,582.59 = 12,615.20/x
  3. Step 3: Cross multiply
    30,408.74x = 45,582.59 × 12,615.20
  4. Step 4: Simplify right side
    30,408.74x = 575,033,489.37
  5. Step 5: Solve for x
    x = 575,033,489.37/30,408.74
  6. Step 6: Final answer
    x = 18,910.14

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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.