Home / 31,668.63-43,683.66-20,913.60

Finding the Fourth Proportional to 31,668.63, 43,683.66 and 20,913.60

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Solution

The fourth proportional to 31,668.63, 43,683.66 and 20,913.60 is: 28,848.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,668.63 : 43,683.66 = 20,913.60 : x
  2. Step 2: Convert to fraction form
    31,668.63/43,683.66 = 20,913.60/x
  3. Step 3: Cross multiply
    31,668.63x = 43,683.66 × 20,913.60
  4. Step 4: Simplify right side
    31,668.63x = 913,582,591.78
  5. Step 5: Solve for x
    x = 913,582,591.78/31,668.63
  6. Step 6: Final answer
    x = 28,848.19

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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.