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Finding the Fourth Proportional to 20,535.92, 28,162.80 and 19,683.80

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Solution

The fourth proportional to 20,535.92, 28,162.80 and 19,683.80 is: 26,994.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,535.92 : 28,162.80 = 19,683.80 : x
  2. Step 2: Convert to fraction form
    20,535.92/28,162.80 = 19,683.80/x
  3. Step 3: Cross multiply
    20,535.92x = 28,162.80 × 19,683.80
  4. Step 4: Simplify right side
    20,535.92x = 554,350,922.64
  5. Step 5: Solve for x
    x = 554,350,922.64/20,535.92
  6. Step 6: Final answer
    x = 26,994.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.