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Finding the Fourth Proportional to 21,602.69, 29,811.71 and 11,666.69

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Solution

The fourth proportional to 21,602.69, 29,811.71 and 11,666.69 is: 16,100.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,602.69 : 29,811.71 = 11,666.69 : x
  2. Step 2: Convert to fraction form
    21,602.69/29,811.71 = 11,666.69/x
  3. Step 3: Cross multiply
    21,602.69x = 29,811.71 × 11,666.69
  4. Step 4: Simplify right side
    21,602.69x = 347,803,978.94
  5. Step 5: Solve for x
    x = 347,803,978.94/21,602.69
  6. Step 6: Final answer
    x = 16,100.03

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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.