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Finding the Fourth Proportional to 29,948.80, 44,928.60 and 12,420.40

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Solution

The fourth proportional to 29,948.80, 44,928.60 and 12,420.40 is: 18,632.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,948.80 : 44,928.60 = 12,420.40 : x
  2. Step 2: Convert to fraction form
    29,948.80/44,928.60 = 12,420.40/x
  3. Step 3: Cross multiply
    29,948.80x = 44,928.60 × 12,420.40
  4. Step 4: Simplify right side
    29,948.80x = 558,031,183.44
  5. Step 5: Solve for x
    x = 558,031,183.44/29,948.80
  6. Step 6: Final answer
    x = 18,632.84

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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.