Home / 20,355.57-30,490.83-12,923.28

Finding the Fourth Proportional to 20,355.57, 30,490.83 and 12,923.28

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Solution

The fourth proportional to 20,355.57, 30,490.83 and 12,923.28 is: 19,357.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,355.57 : 30,490.83 = 12,923.28 : x
  2. Step 2: Convert to fraction form
    20,355.57/30,490.83 = 12,923.28/x
  3. Step 3: Cross multiply
    20,355.57x = 30,490.83 × 12,923.28
  4. Step 4: Simplify right side
    20,355.57x = 394,041,533.52
  5. Step 5: Solve for x
    x = 394,041,533.52/20,355.57
  6. Step 6: Final answer
    x = 19,357.92

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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.