Home / 20,075.38-27,701.78-11,120.63

Finding the Fourth Proportional to 20,075.38, 27,701.78 and 11,120.63

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Solution

The fourth proportional to 20,075.38, 27,701.78 and 11,120.63 is: 15,345.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,075.38 : 27,701.78 = 11,120.63 : x
  2. Step 2: Convert to fraction form
    20,075.38/27,701.78 = 11,120.63/x
  3. Step 3: Cross multiply
    20,075.38x = 27,701.78 × 11,120.63
  4. Step 4: Simplify right side
    20,075.38x = 308,061,051.61
  5. Step 5: Solve for x
    x = 308,061,051.61/20,075.38
  6. Step 6: Final answer
    x = 15,345.22

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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.