Home / 21,611.86-29,817.51-12,178.60

Finding the Fourth Proportional to 21,611.86, 29,817.51 and 12,178.60

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Solution

The fourth proportional to 21,611.86, 29,817.51 and 12,178.60 is: 16,802.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,611.86 : 29,817.51 = 12,178.60 : x
  2. Step 2: Convert to fraction form
    21,611.86/29,817.51 = 12,178.60/x
  3. Step 3: Cross multiply
    21,611.86x = 29,817.51 × 12,178.60
  4. Step 4: Simplify right side
    21,611.86x = 363,135,527.29
  5. Step 5: Solve for x
    x = 363,135,527.29/21,611.86
  6. Step 6: Final answer
    x = 16,802.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.