Home / 20,388.50-28,136.18-11,896.46

Finding the Fourth Proportional to 20,388.50, 28,136.18 and 11,896.46

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Solution

The fourth proportional to 20,388.50, 28,136.18 and 11,896.46 is: 16,417.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,388.50 : 28,136.18 = 11,896.46 : x
  2. Step 2: Convert to fraction form
    20,388.50/28,136.18 = 11,896.46/x
  3. Step 3: Cross multiply
    20,388.50x = 28,136.18 × 11,896.46
  4. Step 4: Simplify right side
    20,388.50x = 334,720,939.92
  5. Step 5: Solve for x
    x = 334,720,939.92/20,388.50
  6. Step 6: Final answer
    x = 16,417.14

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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.