Home / 28,680.40-43,021.32-13,886.56

Finding the Fourth Proportional to 28,680.40, 43,021.32 and 13,886.56

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Solution

The fourth proportional to 28,680.40, 43,021.32 and 13,886.56 is: 20,830.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,680.40 : 43,021.32 = 13,886.56 : x
  2. Step 2: Convert to fraction form
    28,680.40/43,021.32 = 13,886.56/x
  3. Step 3: Cross multiply
    28,680.40x = 43,021.32 × 13,886.56
  4. Step 4: Simplify right side
    28,680.40x = 597,418,141.46
  5. Step 5: Solve for x
    x = 597,418,141.46/28,680.40
  6. Step 6: Final answer
    x = 20,830.19

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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.