Home / 39,780.99-54,897.31-21,874.93

Finding the Fourth Proportional to 39,780.99, 54,897.31 and 21,874.93

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Solution

The fourth proportional to 39,780.99, 54,897.31 and 21,874.93 is: 30,187.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,780.99 : 54,897.31 = 21,874.93 : x
  2. Step 2: Convert to fraction form
    39,780.99/54,897.31 = 21,874.93/x
  3. Step 3: Cross multiply
    39,780.99x = 54,897.31 × 21,874.93
  4. Step 4: Simplify right side
    39,780.99x = 1,200,874,813.44
  5. Step 5: Solve for x
    x = 1,200,874,813.44/39,780.99
  6. Step 6: Final answer
    x = 30,187.15

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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.