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Finding the Fourth Proportional to 28,018.86, 42,030 and 9,045.42

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Solution

The fourth proportional to 28,018.86, 42,030 and 9,045.42 is: 13,568.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,018.86 : 42,030 = 9,045.42 : x
  2. Step 2: Convert to fraction form
    28,018.86/42,030 = 9,045.42/x
  3. Step 3: Cross multiply
    28,018.86x = 42,030 × 9,045.42
  4. Step 4: Simplify right side
    28,018.86x = 380,179,002.60
  5. Step 5: Solve for x
    x = 380,179,002.60/28,018.86
  6. Step 6: Final answer
    x = 13,568.68

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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.