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Finding the Fourth Proportional to 40,285.40, 60,427.80 and 12,205.40

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Solution

The fourth proportional to 40,285.40, 60,427.80 and 12,205.40 is: 18,308.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,285.40 : 60,427.80 = 12,205.40 : x
  2. Step 2: Convert to fraction form
    40,285.40/60,427.80 = 12,205.40/x
  3. Step 3: Cross multiply
    40,285.40x = 60,427.80 × 12,205.40
  4. Step 4: Simplify right side
    40,285.40x = 737,545,470.12
  5. Step 5: Solve for x
    x = 737,545,470.12/40,285.40
  6. Step 6: Final answer
    x = 18,308.01

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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.