Home / 28,289.28-39,021.96-20,342.28

Finding the Fourth Proportional to 28,289.28, 39,021.96 and 20,342.28

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Solution

The fourth proportional to 28,289.28, 39,021.96 and 20,342.28 is: 28,059.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,289.28 : 39,021.96 = 20,342.28 : x
  2. Step 2: Convert to fraction form
    28,289.28/39,021.96 = 20,342.28/x
  3. Step 3: Cross multiply
    28,289.28x = 39,021.96 × 20,342.28
  4. Step 4: Simplify right side
    28,289.28x = 793,795,636.47
  5. Step 5: Solve for x
    x = 793,795,636.47/28,289.28
  6. Step 6: Final answer
    x = 28,059.94

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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.