Home / 18,778.45-28,172.37-13,242.61

Finding the Fourth Proportional to 18,778.45, 28,172.37 and 13,242.61

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Solution

The fourth proportional to 18,778.45, 28,172.37 and 13,242.61 is: 19,867.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,778.45 : 28,172.37 = 13,242.61 : x
  2. Step 2: Convert to fraction form
    18,778.45/28,172.37 = 13,242.61/x
  3. Step 3: Cross multiply
    18,778.45x = 28,172.37 × 13,242.61
  4. Step 4: Simplify right side
    18,778.45x = 373,075,708.69
  5. Step 5: Solve for x
    x = 373,075,708.69/18,778.45
  6. Step 6: Final answer
    x = 19,867.23

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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.