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Finding the Fourth Proportional to 20,975.76, 28,940.76 and 14,595.19

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Solution

The fourth proportional to 20,975.76, 28,940.76 and 14,595.19 is: 20,137.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,975.76 : 28,940.76 = 14,595.19 : x
  2. Step 2: Convert to fraction form
    20,975.76/28,940.76 = 14,595.19/x
  3. Step 3: Cross multiply
    20,975.76x = 28,940.76 × 14,595.19
  4. Step 4: Simplify right side
    20,975.76x = 422,395,818.59
  5. Step 5: Solve for x
    x = 422,395,818.59/20,975.76
  6. Step 6: Final answer
    x = 20,137.33

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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.