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Finding the Fourth Proportional to 20,959.51, 28,923.87 and 11,527.87

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Solution

The fourth proportional to 20,959.51, 28,923.87 and 11,527.87 is: 15,908.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,959.51 : 28,923.87 = 11,527.87 : x
  2. Step 2: Convert to fraction form
    20,959.51/28,923.87 = 11,527.87/x
  3. Step 3: Cross multiply
    20,959.51x = 28,923.87 × 11,527.87
  4. Step 4: Simplify right side
    20,959.51x = 333,430,613.26
  5. Step 5: Solve for x
    x = 333,430,613.26/20,959.51
  6. Step 6: Final answer
    x = 15,908.32

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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.