Home / 28,511.18-42,734.91-11,865.68

Finding the Fourth Proportional to 28,511.18, 42,734.91 and 11,865.68

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Solution

The fourth proportional to 28,511.18, 42,734.91 and 11,865.68 is: 17,785.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,511.18 : 42,734.91 = 11,865.68 : x
  2. Step 2: Convert to fraction form
    28,511.18/42,734.91 = 11,865.68/x
  3. Step 3: Cross multiply
    28,511.18x = 42,734.91 × 11,865.68
  4. Step 4: Simplify right side
    28,511.18x = 507,078,766.89
  5. Step 5: Solve for x
    x = 507,078,766.89/28,511.18
  6. Step 6: Final answer
    x = 17,785.26

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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.