Home / 38,920.10-53,706.54-21,918.91

Finding the Fourth Proportional to 38,920.10, 53,706.54 and 21,918.91

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Solution

The fourth proportional to 38,920.10, 53,706.54 and 21,918.91 is: 30,246.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,920.10 : 53,706.54 = 21,918.91 : x
  2. Step 2: Convert to fraction form
    38,920.10/53,706.54 = 21,918.91/x
  3. Step 3: Cross multiply
    38,920.10x = 53,706.54 × 21,918.91
  4. Step 4: Simplify right side
    38,920.10x = 1,177,188,548.14
  5. Step 5: Solve for x
    x = 1,177,188,548.14/38,920.10
  6. Step 6: Final answer
    x = 30,246.29

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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.