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Finding the Fourth Proportional to 28,962, 39,967.92 and 16,386.48

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Solution

The fourth proportional to 28,962, 39,967.92 and 16,386.48 is: 22,613.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,962 : 39,967.92 = 16,386.48 : x
  2. Step 2: Convert to fraction form
    28,962/39,967.92 = 16,386.48/x
  3. Step 3: Cross multiply
    28,962x = 39,967.92 × 16,386.48
  4. Step 4: Simplify right side
    28,962x = 654,933,521.72
  5. Step 5: Solve for x
    x = 654,933,521.72/28,962
  6. Step 6: Final answer
    x = 22,613.55

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.