Home / 20,389.67-28,137.58-11,436.98

Finding the Fourth Proportional to 20,389.67, 28,137.58 and 11,436.98

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Solution

The fourth proportional to 20,389.67, 28,137.58 and 11,436.98 is: 15,782.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,389.67 : 28,137.58 = 11,436.98 : x
  2. Step 2: Convert to fraction form
    20,389.67/28,137.58 = 11,436.98/x
  3. Step 3: Cross multiply
    20,389.67x = 28,137.58 × 11,436.98
  4. Step 4: Simplify right side
    20,389.67x = 321,809,047.41
  5. Step 5: Solve for x
    x = 321,809,047.41/20,389.67
  6. Step 6: Final answer
    x = 15,782.94

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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.