Home / 30,923.05-42,651.80-28,379.03

Finding the Fourth Proportional to 30,923.05, 42,651.80 and 28,379.03

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Solution

The fourth proportional to 30,923.05, 42,651.80 and 28,379.03 is: 39,142.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,923.05 : 42,651.80 = 28,379.03 : x
  2. Step 2: Convert to fraction form
    30,923.05/42,651.80 = 28,379.03/x
  3. Step 3: Cross multiply
    30,923.05x = 42,651.80 × 28,379.03
  4. Step 4: Simplify right side
    30,923.05x = 1,210,416,569.44
  5. Step 5: Solve for x
    x = 1,210,416,569.44/30,923.05
  6. Step 6: Final answer
    x = 39,142.86

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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.