Home / 13,487.79-18,611.61-7,821.36

Finding the Fourth Proportional to 13,487.79, 18,611.61 and 7,821.36

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Solution

The fourth proportional to 13,487.79, 18,611.61 and 7,821.36 is: 10,792.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,487.79 : 18,611.61 = 7,821.36 : x
  2. Step 2: Convert to fraction form
    13,487.79/18,611.61 = 7,821.36/x
  3. Step 3: Cross multiply
    13,487.79x = 18,611.61 × 7,821.36
  4. Step 4: Simplify right side
    13,487.79x = 145,568,101.99
  5. Step 5: Solve for x
    x = 145,568,101.99/13,487.79
  6. Step 6: Final answer
    x = 10,792.58

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1.5x scale

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.