Home / 13,415.40-20,132.70-5,629.80

Finding the Fourth Proportional to 13,415.40, 20,132.70 and 5,629.80

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Solution

The fourth proportional to 13,415.40, 20,132.70 and 5,629.80 is: 8,448.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,415.40 : 20,132.70 = 5,629.80 : x
  2. Step 2: Convert to fraction form
    13,415.40/20,132.70 = 5,629.80/x
  3. Step 3: Cross multiply
    13,415.40x = 20,132.70 × 5,629.80
  4. Step 4: Simplify right side
    13,415.40x = 113,343,074.46
  5. Step 5: Solve for x
    x = 113,343,074.46/13,415.40
  6. Step 6: Final answer
    x = 8,448.73

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1.5x scale

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.