Home / 20,389.80-30,507.42-12,074.28

Finding the Fourth Proportional to 20,389.80, 30,507.42 and 12,074.28

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Solution

The fourth proportional to 20,389.80, 30,507.42 and 12,074.28 is: 18,065.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,389.80 : 30,507.42 = 12,074.28 : x
  2. Step 2: Convert to fraction form
    20,389.80/30,507.42 = 12,074.28/x
  3. Step 3: Cross multiply
    20,389.80x = 30,507.42 × 12,074.28
  4. Step 4: Simplify right side
    20,389.80x = 368,355,131.16
  5. Step 5: Solve for x
    x = 368,355,131.16/20,389.80
  6. Step 6: Final answer
    x = 18,065.66

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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.