Home / 14,118.40-19,481.28-7,830.80

Finding the Fourth Proportional to 14,118.40, 19,481.28 and 7,830.80

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Solution

The fourth proportional to 14,118.40, 19,481.28 and 7,830.80 is: 10,805.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,118.40 : 19,481.28 = 7,830.80 : x
  2. Step 2: Convert to fraction form
    14,118.40/19,481.28 = 7,830.80/x
  3. Step 3: Cross multiply
    14,118.40x = 19,481.28 × 7,830.80
  4. Step 4: Simplify right side
    14,118.40x = 152,554,007.42
  5. Step 5: Solve for x
    x = 152,554,007.42/14,118.40
  6. Step 6: Final answer
    x = 10,805.33

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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.