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Finding the Fourth Proportional to 34,590.36, 51,854.82 and 12,687

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Solution

The fourth proportional to 34,590.36, 51,854.82 and 12,687 is: 19,019.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,590.36 : 51,854.82 = 12,687 : x
  2. Step 2: Convert to fraction form
    34,590.36/51,854.82 = 12,687/x
  3. Step 3: Cross multiply
    34,590.36x = 51,854.82 × 12,687
  4. Step 4: Simplify right side
    34,590.36x = 657,882,101.34
  5. Step 5: Solve for x
    x = 657,882,101.34/34,590.36
  6. Step 6: Final answer
    x = 19,019.23

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.