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Finding the Fourth Proportional to 18,057.80, 27,075.90 and 9,309.80

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Solution

The fourth proportional to 18,057.80, 27,075.90 and 9,309.80 is: 13,959.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,057.80 : 27,075.90 = 9,309.80 : x
  2. Step 2: Convert to fraction form
    18,057.80/27,075.90 = 9,309.80/x
  3. Step 3: Cross multiply
    18,057.80x = 27,075.90 × 9,309.80
  4. Step 4: Simplify right side
    18,057.80x = 252,071,213.82
  5. Step 5: Solve for x
    x = 252,071,213.82/18,057.80
  6. Step 6: Final answer
    x = 13,959.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.