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Finding the Fourth Proportional to 20,959.54, 28,923.69 and 11,527.90

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Solution

The fourth proportional to 20,959.54, 28,923.69 and 11,527.90 is: 15,908.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,959.54 : 28,923.69 = 11,527.90 : x
  2. Step 2: Convert to fraction form
    20,959.54/28,923.69 = 11,527.90/x
  3. Step 3: Cross multiply
    20,959.54x = 28,923.69 × 11,527.90
  4. Step 4: Simplify right side
    20,959.54x = 333,429,405.95
  5. Step 5: Solve for x
    x = 333,429,405.95/20,959.54
  6. Step 6: Final answer
    x = 15,908.24

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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.