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Finding the Fourth Proportional to 28,904.60, 43,347.90 and 11,379.80

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Solution

The fourth proportional to 28,904.60, 43,347.90 and 11,379.80 is: 17,066.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,904.60 : 43,347.90 = 11,379.80 : x
  2. Step 2: Convert to fraction form
    28,904.60/43,347.90 = 11,379.80/x
  3. Step 3: Cross multiply
    28,904.60x = 43,347.90 × 11,379.80
  4. Step 4: Simplify right side
    28,904.60x = 493,290,432.42
  5. Step 5: Solve for x
    x = 493,290,432.42/28,904.60
  6. Step 6: Final answer
    x = 17,066.16

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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.