Home / 31,491.91-43,455.62-19,390.47

Finding the Fourth Proportional to 31,491.91, 43,455.62 and 19,390.47

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Solution

The fourth proportional to 31,491.91, 43,455.62 and 19,390.47 is: 26,756.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,491.91 : 43,455.62 = 19,390.47 : x
  2. Step 2: Convert to fraction form
    31,491.91/43,455.62 = 19,390.47/x
  3. Step 3: Cross multiply
    31,491.91x = 43,455.62 × 19,390.47
  4. Step 4: Simplify right side
    31,491.91x = 842,624,895.94
  5. Step 5: Solve for x
    x = 842,624,895.94/31,491.91
  6. Step 6: Final answer
    x = 26,756.87

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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.