Home / 30,420.18-45,630.07-12,408.34

Finding the Fourth Proportional to 30,420.18, 45,630.07 and 12,408.34

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Solution

The fourth proportional to 30,420.18, 45,630.07 and 12,408.34 is: 18,612.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,420.18 : 45,630.07 = 12,408.34 : x
  2. Step 2: Convert to fraction form
    30,420.18/45,630.07 = 12,408.34/x
  3. Step 3: Cross multiply
    30,420.18x = 45,630.07 × 12,408.34
  4. Step 4: Simplify right side
    30,420.18x = 566,193,422.78
  5. Step 5: Solve for x
    x = 566,193,422.78/30,420.18
  6. Step 6: Final answer
    x = 18,612.43

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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.