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Finding the Fourth Proportional to 12,799.98, 17,672.67 and 8,021.88

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Solution

The fourth proportional to 12,799.98, 17,672.67 and 8,021.88 is: 11,075.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,799.98 : 17,672.67 = 8,021.88 : x
  2. Step 2: Convert to fraction form
    12,799.98/17,672.67 = 8,021.88/x
  3. Step 3: Cross multiply
    12,799.98x = 17,672.67 × 8,021.88
  4. Step 4: Simplify right side
    12,799.98x = 141,768,038.02
  5. Step 5: Solve for x
    x = 141,768,038.02/12,799.98
  6. Step 6: Final answer
    x = 11,075.65

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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.