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Finding the Fourth Proportional to 18,995.81, 28,497.05 and 7,308.11

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Solution

The fourth proportional to 18,995.81, 28,497.05 and 7,308.11 is: 10,963.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,995.81 : 28,497.05 = 7,308.11 : x
  2. Step 2: Convert to fraction form
    18,995.81/28,497.05 = 7,308.11/x
  3. Step 3: Cross multiply
    18,995.81x = 28,497.05 × 7,308.11
  4. Step 4: Simplify right side
    18,995.81x = 208,259,397.05
  5. Step 5: Solve for x
    x = 208,259,397.05/18,995.81
  6. Step 6: Final answer
    x = 10,963.44

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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.