Home / 30,918.11-42,652.98-18,977.09

Finding the Fourth Proportional to 30,918.11, 42,652.98 and 18,977.09

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Solution

The fourth proportional to 30,918.11, 42,652.98 and 18,977.09 is: 26,179.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,918.11 : 42,652.98 = 18,977.09 : x
  2. Step 2: Convert to fraction form
    30,918.11/42,652.98 = 18,977.09/x
  3. Step 3: Cross multiply
    30,918.11x = 42,652.98 × 18,977.09
  4. Step 4: Simplify right side
    30,918.11x = 809,429,226.96
  5. Step 5: Solve for x
    x = 809,429,226.96/30,918.11
  6. Step 6: Final answer
    x = 26,179.78

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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.