Home / 28,778.94-39,730.43-20,191.41

Finding the Fourth Proportional to 28,778.94, 39,730.43 and 20,191.41

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Solution

The fourth proportional to 28,778.94, 39,730.43 and 20,191.41 is: 27,875.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,778.94 : 39,730.43 = 20,191.41 : x
  2. Step 2: Convert to fraction form
    28,778.94/39,730.43 = 20,191.41/x
  3. Step 3: Cross multiply
    28,778.94x = 39,730.43 × 20,191.41
  4. Step 4: Simplify right side
    28,778.94x = 802,213,452.08
  5. Step 5: Solve for x
    x = 802,213,452.08/28,778.94
  6. Step 6: Final answer
    x = 27,875.02

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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.