Home / 30,649.47-42,296.31-17,220.72

Finding the Fourth Proportional to 30,649.47, 42,296.31 and 17,220.72

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Solution

The fourth proportional to 30,649.47, 42,296.31 and 17,220.72 is: 23,764.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,649.47 : 42,296.31 = 17,220.72 : x
  2. Step 2: Convert to fraction form
    30,649.47/42,296.31 = 17,220.72/x
  3. Step 3: Cross multiply
    30,649.47x = 42,296.31 × 17,220.72
  4. Step 4: Simplify right side
    30,649.47x = 728,372,911.54
  5. Step 5: Solve for x
    x = 728,372,911.54/30,649.47
  6. Step 6: Final answer
    x = 23,764.62

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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.