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Finding the Fourth Proportional to 21,361.12, 32,041.68 and 8,211.04

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Solution

The fourth proportional to 21,361.12, 32,041.68 and 8,211.04 is: 12,316.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,361.12 : 32,041.68 = 8,211.04 : x
  2. Step 2: Convert to fraction form
    21,361.12/32,041.68 = 8,211.04/x
  3. Step 3: Cross multiply
    21,361.12x = 32,041.68 × 8,211.04
  4. Step 4: Simplify right side
    21,361.12x = 263,095,516.15
  5. Step 5: Solve for x
    x = 263,095,516.15/21,361.12
  6. Step 6: Final answer
    x = 12,316.56

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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.