Home / 21,075.74-31,618.53-11,212.77

Finding the Fourth Proportional to 21,075.74, 31,618.53 and 11,212.77

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Solution

The fourth proportional to 21,075.74, 31,618.53 and 11,212.77 is: 16,821.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,075.74 : 31,618.53 = 11,212.77 : x
  2. Step 2: Convert to fraction form
    21,075.74/31,618.53 = 11,212.77/x
  3. Step 3: Cross multiply
    21,075.74x = 31,618.53 × 11,212.77
  4. Step 4: Simplify right side
    21,075.74x = 354,531,304.63
  5. Step 5: Solve for x
    x = 354,531,304.63/21,075.74
  6. Step 6: Final answer
    x = 16,821.78

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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.