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Finding the Fourth Proportional to 21,043.68, 29,039.84 and 11,483.12

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Solution

The fourth proportional to 21,043.68, 29,039.84 and 11,483.12 is: 15,846.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,043.68 : 29,039.84 = 11,483.12 : x
  2. Step 2: Convert to fraction form
    21,043.68/29,039.84 = 11,483.12/x
  3. Step 3: Cross multiply
    21,043.68x = 29,039.84 × 11,483.12
  4. Step 4: Simplify right side
    21,043.68x = 333,467,967.50
  5. Step 5: Solve for x
    x = 333,467,967.50/21,043.68
  6. Step 6: Final answer
    x = 15,846.47

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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.