Home / 21,004-28,985.21-12,051.31

Finding the Fourth Proportional to 21,004, 28,985.21 and 12,051.31

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Solution

The fourth proportional to 21,004, 28,985.21 and 12,051.31 is: 16,630.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,004 : 28,985.21 = 12,051.31 : x
  2. Step 2: Convert to fraction form
    21,004/28,985.21 = 12,051.31/x
  3. Step 3: Cross multiply
    21,004x = 28,985.21 × 12,051.31
  4. Step 4: Simplify right side
    21,004x = 349,309,606.20
  5. Step 5: Solve for x
    x = 349,309,606.20/21,004
  6. Step 6: Final answer
    x = 16,630.62

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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.