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Finding the Fourth Proportional to 12,587.86, 18,881.82 and 3,353.86

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Solution

The fourth proportional to 12,587.86, 18,881.82 and 3,353.86 is: 5,030.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,587.86 : 18,881.82 = 3,353.86 : x
  2. Step 2: Convert to fraction form
    12,587.86/18,881.82 = 3,353.86/x
  3. Step 3: Cross multiply
    12,587.86x = 18,881.82 × 3,353.86
  4. Step 4: Simplify right side
    12,587.86x = 63,326,980.83
  5. Step 5: Solve for x
    x = 63,326,980.83/12,587.86
  6. Step 6: Final answer
    x = 5,030.80

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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.