Home / 30,438.18-41,970.50-19,668.88

Finding the Fourth Proportional to 30,438.18, 41,970.50 and 19,668.88

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Solution

The fourth proportional to 30,438.18, 41,970.50 and 19,668.88 is: 27,120.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,438.18 : 41,970.50 = 19,668.88 : x
  2. Step 2: Convert to fraction form
    30,438.18/41,970.50 = 19,668.88/x
  3. Step 3: Cross multiply
    30,438.18x = 41,970.50 × 19,668.88
  4. Step 4: Simplify right side
    30,438.18x = 825,512,630.47
  5. Step 5: Solve for x
    x = 825,512,630.47/30,438.18
  6. Step 6: Final answer
    x = 27,120.96

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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.