Home / 28,815.09-43,138.58-17,688.05

Finding the Fourth Proportional to 28,815.09, 43,138.58 and 17,688.05

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Solution

The fourth proportional to 28,815.09, 43,138.58 and 17,688.05 is: 26,480.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,815.09 : 43,138.58 = 17,688.05 : x
  2. Step 2: Convert to fraction form
    28,815.09/43,138.58 = 17,688.05/x
  3. Step 3: Cross multiply
    28,815.09x = 43,138.58 × 17,688.05
  4. Step 4: Simplify right side
    28,815.09x = 763,037,096.28
  5. Step 5: Solve for x
    x = 763,037,096.28/28,815.09
  6. Step 6: Final answer
    x = 26,480.47

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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.