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Finding the Fourth Proportional to 28,668.51, 42,958.89 and 12,019.44

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Solution

The fourth proportional to 28,668.51, 42,958.89 and 12,019.44 is: 18,010.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,668.51 : 42,958.89 = 12,019.44 : x
  2. Step 2: Convert to fraction form
    28,668.51/42,958.89 = 12,019.44/x
  3. Step 3: Cross multiply
    28,668.51x = 42,958.89 × 12,019.44
  4. Step 4: Simplify right side
    28,668.51x = 516,341,800.82
  5. Step 5: Solve for x
    x = 516,341,800.82/28,668.51
  6. Step 6: Final answer
    x = 18,010.77

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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.