Home / 28,431.52-42,640.32-12,627.84

Finding the Fourth Proportional to 28,431.52, 42,640.32 and 12,627.84

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Solution

The fourth proportional to 28,431.52, 42,640.32 and 12,627.84 is: 18,938.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,431.52 : 42,640.32 = 12,627.84 : x
  2. Step 2: Convert to fraction form
    28,431.52/42,640.32 = 12,627.84/x
  3. Step 3: Cross multiply
    28,431.52x = 42,640.32 × 12,627.84
  4. Step 4: Simplify right side
    28,431.52x = 538,455,138.51
  5. Step 5: Solve for x
    x = 538,455,138.51/28,431.52
  6. Step 6: Final answer
    x = 18,938.67

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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.