Home / 20,885.40-28,819.18-11,933.48

Finding the Fourth Proportional to 20,885.40, 28,819.18 and 11,933.48

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Solution

The fourth proportional to 20,885.40, 28,819.18 and 11,933.48 is: 16,466.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,885.40 : 28,819.18 = 11,933.48 : x
  2. Step 2: Convert to fraction form
    20,885.40/28,819.18 = 11,933.48/x
  3. Step 3: Cross multiply
    20,885.40x = 28,819.18 × 11,933.48
  4. Step 4: Simplify right side
    20,885.40x = 343,913,051.02
  5. Step 5: Solve for x
    x = 343,913,051.02/20,885.40
  6. Step 6: Final answer
    x = 16,466.68

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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.