Home / 21,075.85-31,604.50-11,212.78

Finding the Fourth Proportional to 21,075.85, 31,604.50 and 11,212.78

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Solution

The fourth proportional to 21,075.85, 31,604.50 and 11,212.78 is: 16,814.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,075.85 : 31,604.50 = 11,212.78 : x
  2. Step 2: Convert to fraction form
    21,075.85/31,604.50 = 11,212.78/x
  3. Step 3: Cross multiply
    21,075.85x = 31,604.50 × 11,212.78
  4. Step 4: Simplify right side
    21,075.85x = 354,374,331.31
  5. Step 5: Solve for x
    x = 354,374,331.31/21,075.85
  6. Step 6: Final answer
    x = 16,814.24

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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.