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Finding the Fourth Proportional to 43,396.80, 65,095.20 and 21,224.40

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Solution

The fourth proportional to 43,396.80, 65,095.20 and 21,224.40 is: 31,836.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,396.80 : 65,095.20 = 21,224.40 : x
  2. Step 2: Convert to fraction form
    43,396.80/65,095.20 = 21,224.40/x
  3. Step 3: Cross multiply
    43,396.80x = 65,095.20 × 21,224.40
  4. Step 4: Simplify right side
    43,396.80x = 1,381,606,562.88
  5. Step 5: Solve for x
    x = 1,381,606,562.88/43,396.80
  6. Step 6: Final answer
    x = 31,836.60

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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.