Home / 30,928.13-42,680.90-16,780.97

Finding the Fourth Proportional to 30,928.13, 42,680.90 and 16,780.97

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Solution

The fourth proportional to 30,928.13, 42,680.90 and 16,780.97 is: 23,157.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,928.13 : 42,680.90 = 16,780.97 : x
  2. Step 2: Convert to fraction form
    30,928.13/42,680.90 = 16,780.97/x
  3. Step 3: Cross multiply
    30,928.13x = 42,680.90 × 16,780.97
  4. Step 4: Simplify right side
    30,928.13x = 716,227,003.93
  5. Step 5: Solve for x
    x = 716,227,003.93/30,928.13
  6. Step 6: Final answer
    x = 23,157.79

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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.