Home / 21,359.50-29,474.45-12,405.54

Finding the Fourth Proportional to 21,359.50, 29,474.45 and 12,405.54

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Solution

The fourth proportional to 21,359.50, 29,474.45 and 12,405.54 is: 17,118.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,359.50 : 29,474.45 = 12,405.54 : x
  2. Step 2: Convert to fraction form
    21,359.50/29,474.45 = 12,405.54/x
  3. Step 3: Cross multiply
    21,359.50x = 29,474.45 × 12,405.54
  4. Step 4: Simplify right side
    21,359.50x = 365,646,468.45
  5. Step 5: Solve for x
    x = 365,646,468.45/21,359.50
  6. Step 6: Final answer
    x = 17,118.68

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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.