Home / 18,907.90-26,091.30-11,145.47

Finding the Fourth Proportional to 18,907.90, 26,091.30 and 11,145.47

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Solution

The fourth proportional to 18,907.90, 26,091.30 and 11,145.47 is: 15,379.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,907.90 : 26,091.30 = 11,145.47 : x
  2. Step 2: Convert to fraction form
    18,907.90/26,091.30 = 11,145.47/x
  3. Step 3: Cross multiply
    18,907.90x = 26,091.30 × 11,145.47
  4. Step 4: Simplify right side
    18,907.90x = 290,799,801.41
  5. Step 5: Solve for x
    x = 290,799,801.41/18,907.90
  6. Step 6: Final answer
    x = 15,379.81

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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.