Home / 31,695.99-43,740.51-20,365.53

Finding the Fourth Proportional to 31,695.99, 43,740.51 and 20,365.53

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Solution

The fourth proportional to 31,695.99, 43,740.51 and 20,365.53 is: 28,104.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,695.99 : 43,740.51 = 20,365.53 : x
  2. Step 2: Convert to fraction form
    31,695.99/43,740.51 = 20,365.53/x
  3. Step 3: Cross multiply
    31,695.99x = 43,740.51 × 20,365.53
  4. Step 4: Simplify right side
    31,695.99x = 890,798,668.62
  5. Step 5: Solve for x
    x = 890,798,668.62/31,695.99
  6. Step 6: Final answer
    x = 28,104.46

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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.