Home / 30,290.82-45,477.20-20,907.51

Finding the Fourth Proportional to 30,290.82, 45,477.20 and 20,907.51

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Solution

The fourth proportional to 30,290.82, 45,477.20 and 20,907.51 is: 31,389.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,290.82 : 45,477.20 = 20,907.51 : x
  2. Step 2: Convert to fraction form
    30,290.82/45,477.20 = 20,907.51/x
  3. Step 3: Cross multiply
    30,290.82x = 45,477.20 × 20,907.51
  4. Step 4: Simplify right side
    30,290.82x = 950,815,013.77
  5. Step 5: Solve for x
    x = 950,815,013.77/30,290.82
  6. Step 6: Final answer
    x = 31,389.54

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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.