Home / 31,108.26-42,929.40-19,930.26

Finding the Fourth Proportional to 31,108.26, 42,929.40 and 19,930.26

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Solution

The fourth proportional to 31,108.26, 42,929.40 and 19,930.26 is: 27,503.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,108.26 : 42,929.40 = 19,930.26 : x
  2. Step 2: Convert to fraction form
    31,108.26/42,929.40 = 19,930.26/x
  3. Step 3: Cross multiply
    31,108.26x = 42,929.40 × 19,930.26
  4. Step 4: Simplify right side
    31,108.26x = 855,594,103.64
  5. Step 5: Solve for x
    x = 855,594,103.64/31,108.26
  6. Step 6: Final answer
    x = 27,503.76

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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.