Home / 20,490.85-30,736.28-18,676.45

Finding the Fourth Proportional to 20,490.85, 30,736.28 and 18,676.45

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Solution

The fourth proportional to 20,490.85, 30,736.28 and 18,676.45 is: 28,014.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,490.85 : 30,736.28 = 18,676.45 : x
  2. Step 2: Convert to fraction form
    20,490.85/30,736.28 = 18,676.45/x
  3. Step 3: Cross multiply
    20,490.85x = 30,736.28 × 18,676.45
  4. Step 4: Simplify right side
    20,490.85x = 574,044,503.22
  5. Step 5: Solve for x
    x = 574,044,503.22/20,490.85
  6. Step 6: Final answer
    x = 28,014.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.