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Finding the Fourth Proportional to 18,673.71, 28,019.07 and 6,987.84

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Solution

The fourth proportional to 18,673.71, 28,019.07 and 6,987.84 is: 10,484.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,673.71 : 28,019.07 = 6,987.84 : x
  2. Step 2: Convert to fraction form
    18,673.71/28,019.07 = 6,987.84/x
  3. Step 3: Cross multiply
    18,673.71x = 28,019.07 × 6,987.84
  4. Step 4: Simplify right side
    18,673.71x = 195,792,778.11
  5. Step 5: Solve for x
    x = 195,792,778.11/18,673.71
  6. Step 6: Final answer
    x = 10,484.94

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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.