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Finding the Fourth Proportional to 21,777.01, 30,053.58 and 12,830.48

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Solution

The fourth proportional to 21,777.01, 30,053.58 and 12,830.48 is: 17,706.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,777.01 : 30,053.58 = 12,830.48 : x
  2. Step 2: Convert to fraction form
    21,777.01/30,053.58 = 12,830.48/x
  3. Step 3: Cross multiply
    21,777.01x = 30,053.58 × 12,830.48
  4. Step 4: Simplify right side
    21,777.01x = 385,601,759.08
  5. Step 5: Solve for x
    x = 385,601,759.08/21,777.01
  6. Step 6: Final answer
    x = 17,706.83

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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.