Home / 21,740.80-29,999.92-12,309.44

Finding the Fourth Proportional to 21,740.80, 29,999.92 and 12,309.44

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Solution

The fourth proportional to 21,740.80, 29,999.92 and 12,309.44 is: 16,985.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,740.80 : 29,999.92 = 12,309.44 : x
  2. Step 2: Convert to fraction form
    21,740.80/29,999.92 = 12,309.44/x
  3. Step 3: Cross multiply
    21,740.80x = 29,999.92 × 12,309.44
  4. Step 4: Simplify right side
    21,740.80x = 369,282,215.24
  5. Step 5: Solve for x
    x = 369,282,215.24/21,740.80
  6. Step 6: Final answer
    x = 16,985.68

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1.5x scale

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.