Home / 31,491.78-43,455.45-19,390.35

Finding the Fourth Proportional to 31,491.78, 43,455.45 and 19,390.35

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Solution

The fourth proportional to 31,491.78, 43,455.45 and 19,390.35 is: 26,756.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,491.78 : 43,455.45 = 19,390.35 : x
  2. Step 2: Convert to fraction form
    31,491.78/43,455.45 = 19,390.35/x
  3. Step 3: Cross multiply
    31,491.78x = 43,455.45 × 19,390.35
  4. Step 4: Simplify right side
    31,491.78x = 842,616,384.91
  5. Step 5: Solve for x
    x = 842,616,384.91/31,491.78
  6. Step 6: Final answer
    x = 26,756.71

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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.