Home / 20,795.78-28,699.35-13,717.19

Finding the Fourth Proportional to 20,795.78, 28,699.35 and 13,717.19

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Solution

The fourth proportional to 20,795.78, 28,699.35 and 13,717.19 is: 18,930.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,795.78 : 28,699.35 = 13,717.19 : x
  2. Step 2: Convert to fraction form
    20,795.78/28,699.35 = 13,717.19/x
  3. Step 3: Cross multiply
    20,795.78x = 28,699.35 × 13,717.19
  4. Step 4: Simplify right side
    20,795.78x = 393,674,457.14
  5. Step 5: Solve for x
    x = 393,674,457.14/20,795.78
  6. Step 6: Final answer
    x = 18,930.50

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.