Home / 20,215.98-30,320.36-7,072.12

Finding the Fourth Proportional to 20,215.98, 30,320.36 and 7,072.12

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Solution

The fourth proportional to 20,215.98, 30,320.36 and 7,072.12 is: 10,606.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,215.98 : 30,320.36 = 7,072.12 : x
  2. Step 2: Convert to fraction form
    20,215.98/30,320.36 = 7,072.12/x
  3. Step 3: Cross multiply
    20,215.98x = 30,320.36 × 7,072.12
  4. Step 4: Simplify right side
    20,215.98x = 214,429,224.36
  5. Step 5: Solve for x
    x = 214,429,224.36/20,215.98
  6. Step 6: Final answer
    x = 10,606.92

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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.