Home / 30,420.79-41,976.54-16,990.33

Finding the Fourth Proportional to 30,420.79, 41,976.54 and 16,990.33

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Solution

The fourth proportional to 30,420.79, 41,976.54 and 16,990.33 is: 23,444.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,420.79 : 41,976.54 = 16,990.33 : x
  2. Step 2: Convert to fraction form
    30,420.79/41,976.54 = 16,990.33/x
  3. Step 3: Cross multiply
    30,420.79x = 41,976.54 × 16,990.33
  4. Step 4: Simplify right side
    30,420.79x = 713,195,266.86
  5. Step 5: Solve for x
    x = 713,195,266.86/30,420.79
  6. Step 6: Final answer
    x = 23,444.34

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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.