Home / 15,789.84-21,791.68-9,075.72

Finding the Fourth Proportional to 15,789.84, 21,791.68 and 9,075.72

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Solution

The fourth proportional to 15,789.84, 21,791.68 and 9,075.72 is: 12,525.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,789.84 : 21,791.68 = 9,075.72 : x
  2. Step 2: Convert to fraction form
    15,789.84/21,791.68 = 9,075.72/x
  3. Step 3: Cross multiply
    15,789.84x = 21,791.68 × 9,075.72
  4. Step 4: Simplify right side
    15,789.84x = 197,775,186.01
  5. Step 5: Solve for x
    x = 197,775,186.01/15,789.84
  6. Step 6: Final answer
    x = 12,525.47

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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.