Home / 39,795.09-54,916.07-21,890.09

Finding the Fourth Proportional to 39,795.09, 54,916.07 and 21,890.09

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Solution

The fourth proportional to 39,795.09, 54,916.07 and 21,890.09 is: 30,207.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,795.09 : 54,916.07 = 21,890.09 : x
  2. Step 2: Convert to fraction form
    39,795.09/54,916.07 = 21,890.09/x
  3. Step 3: Cross multiply
    39,795.09x = 54,916.07 × 21,890.09
  4. Step 4: Simplify right side
    39,795.09x = 1,202,117,714.75
  5. Step 5: Solve for x
    x = 1,202,117,714.75/39,795.09
  6. Step 6: Final answer
    x = 30,207.69

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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.