Home / 21,261.46-29,340.22-12,309.11

Finding the Fourth Proportional to 21,261.46, 29,340.22 and 12,309.11

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Solution

The fourth proportional to 21,261.46, 29,340.22 and 12,309.11 is: 16,986.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,261.46 : 29,340.22 = 12,309.11 : x
  2. Step 2: Convert to fraction form
    21,261.46/29,340.22 = 12,309.11/x
  3. Step 3: Cross multiply
    21,261.46x = 29,340.22 × 12,309.11
  4. Step 4: Simplify right side
    21,261.46x = 361,151,933.86
  5. Step 5: Solve for x
    x = 361,151,933.86/21,261.46
  6. Step 6: Final answer
    x = 16,986.22

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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.