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Finding the Fourth Proportional to 10,893.60, 15,029.04 and 6,645.60

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Solution

The fourth proportional to 10,893.60, 15,029.04 and 6,645.60 is: 9,168.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,893.60 : 15,029.04 = 6,645.60 : x
  2. Step 2: Convert to fraction form
    10,893.60/15,029.04 = 6,645.60/x
  3. Step 3: Cross multiply
    10,893.60x = 15,029.04 × 6,645.60
  4. Step 4: Simplify right side
    10,893.60x = 99,876,988.22
  5. Step 5: Solve for x
    x = 99,876,988.22/10,893.60
  6. Step 6: Final answer
    x = 9,168.41

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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.