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Finding the Fourth Proportional to 30,240.60, 45,360.90 and 20,909.40

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Solution

The fourth proportional to 30,240.60, 45,360.90 and 20,909.40 is: 31,364.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,240.60 : 45,360.90 = 20,909.40 : x
  2. Step 2: Convert to fraction form
    30,240.60/45,360.90 = 20,909.40/x
  3. Step 3: Cross multiply
    30,240.60x = 45,360.90 × 20,909.40
  4. Step 4: Simplify right side
    30,240.60x = 948,469,202.46
  5. Step 5: Solve for x
    x = 948,469,202.46/30,240.60
  6. Step 6: Final answer
    x = 31,364.10

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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.