Home / 20,210.76-27,890.41-11,136.39

Finding the Fourth Proportional to 20,210.76, 27,890.41 and 11,136.39

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Solution

The fourth proportional to 20,210.76, 27,890.41 and 11,136.39 is: 15,367.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,210.76 : 27,890.41 = 11,136.39 : x
  2. Step 2: Convert to fraction form
    20,210.76/27,890.41 = 11,136.39/x
  3. Step 3: Cross multiply
    20,210.76x = 27,890.41 × 11,136.39
  4. Step 4: Simplify right side
    20,210.76x = 310,598,483.02
  5. Step 5: Solve for x
    x = 310,598,483.02/20,210.76
  6. Step 6: Final answer
    x = 15,367.98

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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.