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Finding the Fourth Proportional to 40,405.20, 60,617.52 and 12,703.20

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Solution

The fourth proportional to 40,405.20, 60,617.52 and 12,703.20 is: 19,057.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,405.20 : 60,617.52 = 12,703.20 : x
  2. Step 2: Convert to fraction form
    40,405.20/60,617.52 = 12,703.20/x
  3. Step 3: Cross multiply
    40,405.20x = 60,617.52 × 12,703.20
  4. Step 4: Simplify right side
    40,405.20x = 770,036,480.06
  5. Step 5: Solve for x
    x = 770,036,480.06/40,405.20
  6. Step 6: Final answer
    x = 19,057.86

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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.