Home / 30,739.28-42,420.92-17,128.24

Finding the Fourth Proportional to 30,739.28, 42,420.92 and 17,128.24

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Solution

The fourth proportional to 30,739.28, 42,420.92 and 17,128.24 is: 23,637.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,739.28 : 42,420.92 = 17,128.24 : x
  2. Step 2: Convert to fraction form
    30,739.28/42,420.92 = 17,128.24/x
  3. Step 3: Cross multiply
    30,739.28x = 42,420.92 × 17,128.24
  4. Step 4: Simplify right side
    30,739.28x = 726,595,698.78
  5. Step 5: Solve for x
    x = 726,595,698.78/30,739.28
  6. Step 6: Final answer
    x = 23,637.37

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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.