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Finding the Fourth Proportional to 19,119.85, 28,678.86 and 7,276.33

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Solution

The fourth proportional to 19,119.85, 28,678.86 and 7,276.33 is: 10,914.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,119.85 : 28,678.86 = 7,276.33 : x
  2. Step 2: Convert to fraction form
    19,119.85/28,678.86 = 7,276.33/x
  3. Step 3: Cross multiply
    19,119.85x = 28,678.86 × 7,276.33
  4. Step 4: Simplify right side
    19,119.85x = 208,676,885.23
  5. Step 5: Solve for x
    x = 208,676,885.23/19,119.85
  6. Step 6: Final answer
    x = 10,914.15

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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.