Home / 20,907.36-31,360.50-5,112.36

Finding the Fourth Proportional to 20,907.36, 31,360.50 and 5,112.36

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Solution

The fourth proportional to 20,907.36, 31,360.50 and 5,112.36 is: 7,668.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,907.36 : 31,360.50 = 5,112.36 : x
  2. Step 2: Convert to fraction form
    20,907.36/31,360.50 = 5,112.36/x
  3. Step 3: Cross multiply
    20,907.36x = 31,360.50 × 5,112.36
  4. Step 4: Simplify right side
    20,907.36x = 160,326,165.78
  5. Step 5: Solve for x
    x = 160,326,165.78/20,907.36
  6. Step 6: Final answer
    x = 7,668.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.