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Finding the Fourth Proportional to 29,135.76, 43,703.68 and 12,485

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Solution

The fourth proportional to 29,135.76, 43,703.68 and 12,485 is: 18,727.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,135.76 : 43,703.68 = 12,485 : x
  2. Step 2: Convert to fraction form
    29,135.76/43,703.68 = 12,485/x
  3. Step 3: Cross multiply
    29,135.76x = 43,703.68 × 12,485
  4. Step 4: Simplify right side
    29,135.76x = 545,640,444.80
  5. Step 5: Solve for x
    x = 545,640,444.80/29,135.76
  6. Step 6: Final answer
    x = 18,727.52

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.