Home / 28,770.18-43,172.04-12,129.18

Finding the Fourth Proportional to 28,770.18, 43,172.04 and 12,129.18

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Solution

The fourth proportional to 28,770.18, 43,172.04 and 12,129.18 is: 18,200.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,770.18 : 43,172.04 = 12,129.18 : x
  2. Step 2: Convert to fraction form
    28,770.18/43,172.04 = 12,129.18/x
  3. Step 3: Cross multiply
    28,770.18x = 43,172.04 × 12,129.18
  4. Step 4: Simplify right side
    28,770.18x = 523,641,444.13
  5. Step 5: Solve for x
    x = 523,641,444.13/28,770.18
  6. Step 6: Final answer
    x = 18,200.84

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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.