Home / 28,890.80-43,314.60-12,237.20

Finding the Fourth Proportional to 28,890.80, 43,314.60 and 12,237.20

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Solution

The fourth proportional to 28,890.80, 43,314.60 and 12,237.20 is: 18,346.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,890.80 : 43,314.60 = 12,237.20 : x
  2. Step 2: Convert to fraction form
    28,890.80/43,314.60 = 12,237.20/x
  3. Step 3: Cross multiply
    28,890.80x = 43,314.60 × 12,237.20
  4. Step 4: Simplify right side
    28,890.80x = 530,049,423.12
  5. Step 5: Solve for x
    x = 530,049,423.12/28,890.80
  6. Step 6: Final answer
    x = 18,346.65

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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.