Home / 30,660.66-42,315.64-18,721.48

Finding the Fourth Proportional to 30,660.66, 42,315.64 and 18,721.48

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Solution

The fourth proportional to 30,660.66, 42,315.64 and 18,721.48 is: 25,838.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,660.66 : 42,315.64 = 18,721.48 : x
  2. Step 2: Convert to fraction form
    30,660.66/42,315.64 = 18,721.48/x
  3. Step 3: Cross multiply
    30,660.66x = 42,315.64 × 18,721.48
  4. Step 4: Simplify right side
    30,660.66x = 792,211,407.95
  5. Step 5: Solve for x
    x = 792,211,407.95/30,660.66
  6. Step 6: Final answer
    x = 25,838.04

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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.