Home / 21,304.40-29,400.36-11,872.64

Finding the Fourth Proportional to 21,304.40, 29,400.36 and 11,872.64

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Solution

The fourth proportional to 21,304.40, 29,400.36 and 11,872.64 is: 16,384.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,304.40 : 29,400.36 = 11,872.64 : x
  2. Step 2: Convert to fraction form
    21,304.40/29,400.36 = 11,872.64/x
  3. Step 3: Cross multiply
    21,304.40x = 29,400.36 × 11,872.64
  4. Step 4: Simplify right side
    21,304.40x = 349,059,890.15
  5. Step 5: Solve for x
    x = 349,059,890.15/21,304.40
  6. Step 6: Final answer
    x = 16,384.40

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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.