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Finding the Fourth Proportional to 14,279.80, 19,710.60 and 9,809.80

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Solution

The fourth proportional to 14,279.80, 19,710.60 and 9,809.80 is: 13,540.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,279.80 : 19,710.60 = 9,809.80 : x
  2. Step 2: Convert to fraction form
    14,279.80/19,710.60 = 9,809.80/x
  3. Step 3: Cross multiply
    14,279.80x = 19,710.60 × 9,809.80
  4. Step 4: Simplify right side
    14,279.80x = 193,357,043.88
  5. Step 5: Solve for x
    x = 193,357,043.88/14,279.80
  6. Step 6: Final answer
    x = 13,540.60

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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.