Home / 28,435.79-42,676.91-20,123.81

Finding the Fourth Proportional to 28,435.79, 42,676.91 and 20,123.81

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Solution

The fourth proportional to 28,435.79, 42,676.91 and 20,123.81 is: 30,202.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,435.79 : 42,676.91 = 20,123.81 : x
  2. Step 2: Convert to fraction form
    28,435.79/42,676.91 = 20,123.81/x
  3. Step 3: Cross multiply
    28,435.79x = 42,676.91 × 20,123.81
  4. Step 4: Simplify right side
    28,435.79x = 858,821,714.22
  5. Step 5: Solve for x
    x = 858,821,714.22/28,435.79
  6. Step 6: Final answer
    x = 30,202.15

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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.