Home / 20,388.40-28,136.06-11,896.36

Finding the Fourth Proportional to 20,388.40, 28,136.06 and 11,896.36

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Solution

The fourth proportional to 20,388.40, 28,136.06 and 11,896.36 is: 16,417.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,388.40 : 28,136.06 = 11,896.36 : x
  2. Step 2: Convert to fraction form
    20,388.40/28,136.06 = 11,896.36/x
  3. Step 3: Cross multiply
    20,388.40x = 28,136.06 × 11,896.36
  4. Step 4: Simplify right side
    20,388.40x = 334,716,698.74
  5. Step 5: Solve for x
    x = 334,716,698.74/20,388.40
  6. Step 6: Final answer
    x = 16,417.02

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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.