Home / 21,405.22-29,541.42-12,330.90

Finding the Fourth Proportional to 21,405.22, 29,541.42 and 12,330.90

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Solution

The fourth proportional to 21,405.22, 29,541.42 and 12,330.90 is: 17,017.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,405.22 : 29,541.42 = 12,330.90 : x
  2. Step 2: Convert to fraction form
    21,405.22/29,541.42 = 12,330.90/x
  3. Step 3: Cross multiply
    21,405.22x = 29,541.42 × 12,330.90
  4. Step 4: Simplify right side
    21,405.22x = 364,272,295.88
  5. Step 5: Solve for x
    x = 364,272,295.88/21,405.22
  6. Step 6: Final answer
    x = 17,017.92

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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.