Home / 31,615.21-43,649.33-20,289.59

Finding the Fourth Proportional to 31,615.21, 43,649.33 and 20,289.59

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Solution

The fourth proportional to 31,615.21, 43,649.33 and 20,289.59 is: 28,012.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,615.21 : 43,649.33 = 20,289.59 : x
  2. Step 2: Convert to fraction form
    31,615.21/43,649.33 = 20,289.59/x
  3. Step 3: Cross multiply
    31,615.21x = 43,649.33 × 20,289.59
  4. Step 4: Simplify right side
    31,615.21x = 885,626,967.59
  5. Step 5: Solve for x
    x = 885,626,967.59/31,615.21
  6. Step 6: Final answer
    x = 28,012.69

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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.