Home / 28,083.19-42,132.66-12,289.60

Finding the Fourth Proportional to 28,083.19, 42,132.66 and 12,289.60

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Solution

The fourth proportional to 28,083.19, 42,132.66 and 12,289.60 is: 18,437.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,083.19 : 42,132.66 = 12,289.60 : x
  2. Step 2: Convert to fraction form
    28,083.19/42,132.66 = 12,289.60/x
  3. Step 3: Cross multiply
    28,083.19x = 42,132.66 × 12,289.60
  4. Step 4: Simplify right side
    28,083.19x = 517,793,538.34
  5. Step 5: Solve for x
    x = 517,793,538.34/28,083.19
  6. Step 6: Final answer
    x = 18,437.85

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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.