Home / 20,491.36-30,735.60-11,698.72

Finding the Fourth Proportional to 20,491.36, 30,735.60 and 11,698.72

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Solution

The fourth proportional to 20,491.36, 30,735.60 and 11,698.72 is: 17,547.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,491.36 : 30,735.60 = 11,698.72 : x
  2. Step 2: Convert to fraction form
    20,491.36/30,735.60 = 11,698.72/x
  3. Step 3: Cross multiply
    20,491.36x = 30,735.60 × 11,698.72
  4. Step 4: Simplify right side
    20,491.36x = 359,567,178.43
  5. Step 5: Solve for x
    x = 359,567,178.43/20,491.36
  6. Step 6: Final answer
    x = 17,547.26

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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.