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Finding the Fourth Proportional to 12,974.88, 17,775.65 and 12,488.95

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Solution

The fourth proportional to 12,974.88, 17,775.65 and 12,488.95 is: 17,109.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,974.88 : 17,775.65 = 12,488.95 : x
  2. Step 2: Convert to fraction form
    12,974.88/17,775.65 = 12,488.95/x
  3. Step 3: Cross multiply
    12,974.88x = 17,775.65 × 12,488.95
  4. Step 4: Simplify right side
    12,974.88x = 221,999,204.07
  5. Step 5: Solve for x
    x = 221,999,204.07/12,974.88
  6. Step 6: Final answer
    x = 17,109.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.