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Finding the Fourth Proportional to 30,751.54, 42,429.30 and 18,810.52

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Solution

The fourth proportional to 30,751.54, 42,429.30 and 18,810.52 is: 25,953.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,751.54 : 42,429.30 = 18,810.52 : x
  2. Step 2: Convert to fraction form
    30,751.54/42,429.30 = 18,810.52/x
  3. Step 3: Cross multiply
    30,751.54x = 42,429.30 × 18,810.52
  4. Step 4: Simplify right side
    30,751.54x = 798,117,196.24
  5. Step 5: Solve for x
    x = 798,117,196.24/30,751.54
  6. Step 6: Final answer
    x = 25,953.73

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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.