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Finding the Fourth Proportional to 29,128, 43,692 and 7,240

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Solution

The fourth proportional to 29,128, 43,692 and 7,240 is: 10,860

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,128 : 43,692 = 7,240 : x
  2. Step 2: Convert to fraction form
    29,128/43,692 = 7,240/x
  3. Step 3: Cross multiply
    29,128x = 43,692 × 7,240
  4. Step 4: Simplify right side
    29,128x = 316,330,080
  5. Step 5: Solve for x
    x = 316,330,080/29,128
  6. Step 6: Final answer
    x = 10,860

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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.