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Finding the Fourth Proportional to 18,998.34, 28,502.37 and 7,308.42

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Solution

The fourth proportional to 18,998.34, 28,502.37 and 7,308.42 is: 10,964.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,998.34 : 28,502.37 = 7,308.42 : x
  2. Step 2: Convert to fraction form
    18,998.34/28,502.37 = 7,308.42/x
  3. Step 3: Cross multiply
    18,998.34x = 28,502.37 × 7,308.42
  4. Step 4: Simplify right side
    18,998.34x = 208,307,290.96
  5. Step 5: Solve for x
    x = 208,307,290.96/18,998.34
  6. Step 6: Final answer
    x = 10,964.50

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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.