Home / 19,438.37-26,828.73-12,640.81

Finding the Fourth Proportional to 19,438.37, 26,828.73 and 12,640.81

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Solution

The fourth proportional to 19,438.37, 26,828.73 and 12,640.81 is: 17,446.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,438.37 : 26,828.73 = 12,640.81 : x
  2. Step 2: Convert to fraction form
    19,438.37/26,828.73 = 12,640.81/x
  3. Step 3: Cross multiply
    19,438.37x = 26,828.73 × 12,640.81
  4. Step 4: Simplify right side
    19,438.37x = 339,136,878.47
  5. Step 5: Solve for x
    x = 339,136,878.47/19,438.37
  6. Step 6: Final answer
    x = 17,446.78

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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.