Home / 20,389.50-28,137.56-11,897.46

Finding the Fourth Proportional to 20,389.50, 28,137.56 and 11,897.46

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Solution

The fourth proportional to 20,389.50, 28,137.56 and 11,897.46 is: 16,418.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,389.50 : 28,137.56 = 11,897.46 : x
  2. Step 2: Convert to fraction form
    20,389.50/28,137.56 = 11,897.46/x
  3. Step 3: Cross multiply
    20,389.50x = 28,137.56 × 11,897.46
  4. Step 4: Simplify right side
    20,389.50x = 334,765,494.60
  5. Step 5: Solve for x
    x = 334,765,494.60/20,389.50
  6. Step 6: Final answer
    x = 16,418.52

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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.