Home / 12,279.80-18,419.70-11,329.40

Finding the Fourth Proportional to 12,279.80, 18,419.70 and 11,329.40

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Solution

The fourth proportional to 12,279.80, 18,419.70 and 11,329.40 is: 16,994.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,279.80 : 18,419.70 = 11,329.40 : x
  2. Step 2: Convert to fraction form
    12,279.80/18,419.70 = 11,329.40/x
  3. Step 3: Cross multiply
    12,279.80x = 18,419.70 × 11,329.40
  4. Step 4: Simplify right side
    12,279.80x = 208,684,149.18
  5. Step 5: Solve for x
    x = 208,684,149.18/12,279.80
  6. Step 6: Final answer
    x = 16,994.10

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1.5x scale

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.