Home / 30,409.10-41,965.40-16,979.84

Finding the Fourth Proportional to 30,409.10, 41,965.40 and 16,979.84

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Solution

The fourth proportional to 30,409.10, 41,965.40 and 16,979.84 is: 23,432.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,409.10 : 41,965.40 = 16,979.84 : x
  2. Step 2: Convert to fraction form
    30,409.10/41,965.40 = 16,979.84/x
  3. Step 3: Cross multiply
    30,409.10x = 41,965.40 × 16,979.84
  4. Step 4: Simplify right side
    30,409.10x = 712,565,777.54
  5. Step 5: Solve for x
    x = 712,565,777.54/30,409.10
  6. Step 6: Final answer
    x = 23,432.65

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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.