Home / 20,393.61-28,153.07-13,676.78

Finding the Fourth Proportional to 20,393.61, 28,153.07 and 13,676.78

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Solution

The fourth proportional to 20,393.61, 28,153.07 and 13,676.78 is: 18,880.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,393.61 : 28,153.07 = 13,676.78 : x
  2. Step 2: Convert to fraction form
    20,393.61/28,153.07 = 13,676.78/x
  3. Step 3: Cross multiply
    20,393.61x = 28,153.07 × 13,676.78
  4. Step 4: Simplify right side
    20,393.61x = 385,043,344.71
  5. Step 5: Solve for x
    x = 385,043,344.71/20,393.61
  6. Step 6: Final answer
    x = 18,880.59

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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.