Home / 21,791.55-30,075.78-13,295.52

Finding the Fourth Proportional to 21,791.55, 30,075.78 and 13,295.52

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Solution

The fourth proportional to 21,791.55, 30,075.78 and 13,295.52 is: 18,349.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,791.55 : 30,075.78 = 13,295.52 : x
  2. Step 2: Convert to fraction form
    21,791.55/30,075.78 = 13,295.52/x
  3. Step 3: Cross multiply
    21,791.55x = 30,075.78 × 13,295.52
  4. Step 4: Simplify right side
    21,791.55x = 399,873,134.51
  5. Step 5: Solve for x
    x = 399,873,134.51/21,791.55
  6. Step 6: Final answer
    x = 18,349.92

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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.