Home / 30,996.85-42,736.05-20,075.69

Finding the Fourth Proportional to 30,996.85, 42,736.05 and 20,075.69

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Solution

The fourth proportional to 30,996.85, 42,736.05 and 20,075.69 is: 27,678.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,996.85 : 42,736.05 = 20,075.69 : x
  2. Step 2: Convert to fraction form
    30,996.85/42,736.05 = 20,075.69/x
  3. Step 3: Cross multiply
    30,996.85x = 42,736.05 × 20,075.69
  4. Step 4: Simplify right side
    30,996.85x = 857,955,691.62
  5. Step 5: Solve for x
    x = 857,955,691.62/30,996.85
  6. Step 6: Final answer
    x = 27,678.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.