Home / 30,986.05-42,760.75-16,838.89

Finding the Fourth Proportional to 30,986.05, 42,760.75 and 16,838.89

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Solution

The fourth proportional to 30,986.05, 42,760.75 and 16,838.89 is: 23,237.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,986.05 : 42,760.75 = 16,838.89 : x
  2. Step 2: Convert to fraction form
    30,986.05/42,760.75 = 16,838.89/x
  3. Step 3: Cross multiply
    30,986.05x = 42,760.75 × 16,838.89
  4. Step 4: Simplify right side
    30,986.05x = 720,043,565.57
  5. Step 5: Solve for x
    x = 720,043,565.57/30,986.05
  6. Step 6: Final answer
    x = 23,237.67

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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.