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Finding the Fourth Proportional to 20,957.88, 28,922.48 and 11,527.05

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Solution

The fourth proportional to 20,957.88, 28,922.48 and 11,527.05 is: 15,907.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,957.88 : 28,922.48 = 11,527.05 : x
  2. Step 2: Convert to fraction form
    20,957.88/28,922.48 = 11,527.05/x
  3. Step 3: Cross multiply
    20,957.88x = 28,922.48 × 11,527.05
  4. Step 4: Simplify right side
    20,957.88x = 333,390,873.08
  5. Step 5: Solve for x
    x = 333,390,873.08/20,957.88
  6. Step 6: Final answer
    x = 15,907.66

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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.