Home / 21,114.21-31,692.24-18,757.71

Finding the Fourth Proportional to 21,114.21, 31,692.24 and 18,757.71

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Solution

The fourth proportional to 21,114.21, 31,692.24 and 18,757.71 is: 28,155.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,114.21 : 31,692.24 = 18,757.71 : x
  2. Step 2: Convert to fraction form
    21,114.21/31,692.24 = 18,757.71/x
  3. Step 3: Cross multiply
    21,114.21x = 31,692.24 × 18,757.71
  4. Step 4: Simplify right side
    21,114.21x = 594,473,847.17
  5. Step 5: Solve for x
    x = 594,473,847.17/21,114.21
  6. Step 6: Final answer
    x = 28,155.15

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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.