Home / 20,852.49-28,777.65-11,902.87

Finding the Fourth Proportional to 20,852.49, 28,777.65 and 11,902.87

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Solution

The fourth proportional to 20,852.49, 28,777.65 and 11,902.87 is: 16,426.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,852.49 : 28,777.65 = 11,902.87 : x
  2. Step 2: Convert to fraction form
    20,852.49/28,777.65 = 11,902.87/x
  3. Step 3: Cross multiply
    20,852.49x = 28,777.65 × 11,902.87
  4. Step 4: Simplify right side
    20,852.49x = 342,536,799.56
  5. Step 5: Solve for x
    x = 342,536,799.56/20,852.49
  6. Step 6: Final answer
    x = 16,426.66

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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.