Home / 30,935.41-42,668.80-28,391.36

Finding the Fourth Proportional to 30,935.41, 42,668.80 and 28,391.36

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Solution

The fourth proportional to 30,935.41, 42,668.80 and 28,391.36 is: 39,159.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,935.41 : 42,668.80 = 28,391.36 : x
  2. Step 2: Convert to fraction form
    30,935.41/42,668.80 = 28,391.36/x
  3. Step 3: Cross multiply
    30,935.41x = 42,668.80 × 28,391.36
  4. Step 4: Simplify right side
    30,935.41x = 1,211,425,297.26
  5. Step 5: Solve for x
    x = 1,211,425,297.26/30,935.41
  6. Step 6: Final answer
    x = 39,159.83

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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.