Home / 20,075.40-30,123.90-8,389.80

Finding the Fourth Proportional to 20,075.40, 30,123.90 and 8,389.80

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Solution

The fourth proportional to 20,075.40, 30,123.90 and 8,389.80 is: 12,589.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,075.40 : 30,123.90 = 8,389.80 : x
  2. Step 2: Convert to fraction form
    20,075.40/30,123.90 = 8,389.80/x
  3. Step 3: Cross multiply
    20,075.40x = 30,123.90 × 8,389.80
  4. Step 4: Simplify right side
    20,075.40x = 252,733,496.22
  5. Step 5: Solve for x
    x = 252,733,496.22/20,075.40
  6. Step 6: Final answer
    x = 12,589.21

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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.