Home / 12,117.90-18,259.34-9,974.70

Finding the Fourth Proportional to 12,117.90, 18,259.34 and 9,974.70

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Solution

The fourth proportional to 12,117.90, 18,259.34 and 9,974.70 is: 15,029.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,117.90 : 18,259.34 = 9,974.70 : x
  2. Step 2: Convert to fraction form
    12,117.90/18,259.34 = 9,974.70/x
  3. Step 3: Cross multiply
    12,117.90x = 18,259.34 × 9,974.70
  4. Step 4: Simplify right side
    12,117.90x = 182,131,388.82
  5. Step 5: Solve for x
    x = 182,131,388.82/12,117.90
  6. Step 6: Final answer
    x = 15,029.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.