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Finding the Fourth Proportional to 15,075.65, 20,804.55 and 8,361.38

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Solution

The fourth proportional to 15,075.65, 20,804.55 and 8,361.38 is: 11,538.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,075.65 : 20,804.55 = 8,361.38 : x
  2. Step 2: Convert to fraction form
    15,075.65/20,804.55 = 8,361.38/x
  3. Step 3: Cross multiply
    15,075.65x = 20,804.55 × 8,361.38
  4. Step 4: Simplify right side
    15,075.65x = 173,954,748.28
  5. Step 5: Solve for x
    x = 173,954,748.28/15,075.65
  6. Step 6: Final answer
    x = 11,538.79

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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.