Home / 13,539.79-20,300.14-5,212.81

Finding the Fourth Proportional to 13,539.79, 20,300.14 and 5,212.81

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Solution

The fourth proportional to 13,539.79, 20,300.14 and 5,212.81 is: 7,815.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,539.79 : 20,300.14 = 5,212.81 : x
  2. Step 2: Convert to fraction form
    13,539.79/20,300.14 = 5,212.81/x
  3. Step 3: Cross multiply
    13,539.79x = 20,300.14 × 5,212.81
  4. Step 4: Simplify right side
    13,539.79x = 105,820,772.79
  5. Step 5: Solve for x
    x = 105,820,772.79/13,539.79
  6. Step 6: Final answer
    x = 7,815.54

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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.