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Finding the Fourth Proportional to 43,405.80, 65,108.70 and 21,233.40

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Solution

The fourth proportional to 43,405.80, 65,108.70 and 21,233.40 is: 31,850.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,405.80 : 65,108.70 = 21,233.40 : x
  2. Step 2: Convert to fraction form
    43,405.80/65,108.70 = 21,233.40/x
  3. Step 3: Cross multiply
    43,405.80x = 65,108.70 × 21,233.40
  4. Step 4: Simplify right side
    43,405.80x = 1,382,479,070.58
  5. Step 5: Solve for x
    x = 1,382,479,070.58/43,405.80
  6. Step 6: Final answer
    x = 31,850.10

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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.