Home / 20,075.79-30,120.98-6,929.49

Finding the Fourth Proportional to 20,075.79, 30,120.98 and 6,929.49

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Solution

The fourth proportional to 20,075.79, 30,120.98 and 6,929.49 is: 10,396.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,075.79 : 30,120.98 = 6,929.49 : x
  2. Step 2: Convert to fraction form
    20,075.79/30,120.98 = 6,929.49/x
  3. Step 3: Cross multiply
    20,075.79x = 30,120.98 × 6,929.49
  4. Step 4: Simplify right side
    20,075.79x = 208,722,995.05
  5. Step 5: Solve for x
    x = 208,722,995.05/20,075.79
  6. Step 6: Final answer
    x = 10,396.75

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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.