Home / 30,958.76-42,721.88-16,811.28

Finding the Fourth Proportional to 30,958.76, 42,721.88 and 16,811.28

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Solution

The fourth proportional to 30,958.76, 42,721.88 and 16,811.28 is: 23,198.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,958.76 : 42,721.88 = 16,811.28 : x
  2. Step 2: Convert to fraction form
    30,958.76/42,721.88 = 16,811.28/x
  3. Step 3: Cross multiply
    30,958.76x = 42,721.88 × 16,811.28
  4. Step 4: Simplify right side
    30,958.76x = 718,209,486.81
  5. Step 5: Solve for x
    x = 718,209,486.81/30,958.76
  6. Step 6: Final answer
    x = 23,198.91

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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.