Home / 30,928.24-42,679.80-16,780.78

Finding the Fourth Proportional to 30,928.24, 42,679.80 and 16,780.78

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Solution

The fourth proportional to 30,928.24, 42,679.80 and 16,780.78 is: 23,156.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,928.24 : 42,679.80 = 16,780.78 : x
  2. Step 2: Convert to fraction form
    30,928.24/42,679.80 = 16,780.78/x
  3. Step 3: Cross multiply
    30,928.24x = 42,679.80 × 16,780.78
  4. Step 4: Simplify right side
    30,928.24x = 716,200,334.24
  5. Step 5: Solve for x
    x = 716,200,334.24/30,928.24
  6. Step 6: Final answer
    x = 23,156.84

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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.