Home / 39,421.21-54,401.10-21,516.21

Finding the Fourth Proportional to 39,421.21, 54,401.10 and 21,516.21

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Solution

The fourth proportional to 39,421.21, 54,401.10 and 21,516.21 is: 29,692.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,421.21 : 54,401.10 = 21,516.21 : x
  2. Step 2: Convert to fraction form
    39,421.21/54,401.10 = 21,516.21/x
  3. Step 3: Cross multiply
    39,421.21x = 54,401.10 × 21,516.21
  4. Step 4: Simplify right side
    39,421.21x = 1,170,505,491.83
  5. Step 5: Solve for x
    x = 1,170,505,491.83/39,421.21
  6. Step 6: Final answer
    x = 29,692.28

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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.