Home / 31,415.10-43,349.18-18,668.82

Finding the Fourth Proportional to 31,415.10, 43,349.18 and 18,668.82

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Solution

The fourth proportional to 31,415.10, 43,349.18 and 18,668.82 is: 25,760.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,415.10 : 43,349.18 = 18,668.82 : x
  2. Step 2: Convert to fraction form
    31,415.10/43,349.18 = 18,668.82/x
  3. Step 3: Cross multiply
    31,415.10x = 43,349.18 × 18,668.82
  4. Step 4: Simplify right side
    31,415.10x = 809,278,038.57
  5. Step 5: Solve for x
    x = 809,278,038.57/31,415.10
  6. Step 6: Final answer
    x = 25,760.80

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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.