Home / 21,006-28,988.64-13,566.96

Finding the Fourth Proportional to 21,006, 28,988.64 and 13,566.96

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Solution

The fourth proportional to 21,006, 28,988.64 and 13,566.96 is: 18,722.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,006 : 28,988.64 = 13,566.96 : x
  2. Step 2: Convert to fraction form
    21,006/28,988.64 = 13,566.96/x
  3. Step 3: Cross multiply
    21,006x = 28,988.64 × 13,566.96
  4. Step 4: Simplify right side
    21,006x = 393,287,719.33
  5. Step 5: Solve for x
    x = 393,287,719.33/21,006
  6. Step 6: Final answer
    x = 18,722.64

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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.