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Finding the Fourth Proportional to 28,489.86, 42,741.45 and 8,767.98

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Solution

The fourth proportional to 28,489.86, 42,741.45 and 8,767.98 is: 13,154.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,489.86 : 42,741.45 = 8,767.98 : x
  2. Step 2: Convert to fraction form
    28,489.86/42,741.45 = 8,767.98/x
  3. Step 3: Cross multiply
    28,489.86x = 42,741.45 × 8,767.98
  4. Step 4: Simplify right side
    28,489.86x = 374,756,178.77
  5. Step 5: Solve for x
    x = 374,756,178.77/28,489.86
  6. Step 6: Final answer
    x = 13,154.02

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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.