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Finding the Fourth Proportional to 18,923.35, 28,385.81 and 7,075.92

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Solution

The fourth proportional to 18,923.35, 28,385.81 and 7,075.92 is: 10,614.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,923.35 : 28,385.81 = 7,075.92 : x
  2. Step 2: Convert to fraction form
    18,923.35/28,385.81 = 7,075.92/x
  3. Step 3: Cross multiply
    18,923.35x = 28,385.81 × 7,075.92
  4. Step 4: Simplify right side
    18,923.35x = 200,855,685.32
  5. Step 5: Solve for x
    x = 200,855,685.32/18,923.35
  6. Step 6: Final answer
    x = 10,614.17

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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.