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Finding the Fourth Proportional to 20,662.63, 28,512.30 and 11,710.91

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Solution

The fourth proportional to 20,662.63, 28,512.30 and 11,710.91 is: 16,159.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,662.63 : 28,512.30 = 11,710.91 : x
  2. Step 2: Convert to fraction form
    20,662.63/28,512.30 = 11,710.91/x
  3. Step 3: Cross multiply
    20,662.63x = 28,512.30 × 11,710.91
  4. Step 4: Simplify right side
    20,662.63x = 333,905,094.39
  5. Step 5: Solve for x
    x = 333,905,094.39/20,662.63
  6. Step 6: Final answer
    x = 16,159.86

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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.