Home / 21,209.19-29,272.31-12,261.86

Finding the Fourth Proportional to 21,209.19, 29,272.31 and 12,261.86

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Solution

The fourth proportional to 21,209.19, 29,272.31 and 12,261.86 is: 16,923.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,209.19 : 29,272.31 = 12,261.86 : x
  2. Step 2: Convert to fraction form
    21,209.19/29,272.31 = 12,261.86/x
  3. Step 3: Cross multiply
    21,209.19x = 29,272.31 × 12,261.86
  4. Step 4: Simplify right side
    21,209.19x = 358,932,867.34
  5. Step 5: Solve for x
    x = 358,932,867.34/21,209.19
  6. Step 6: Final answer
    x = 16,923.46

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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.