Home / 21,427,221.20-29,564,964.97-12,728,326.64

Finding the Fourth Proportional to 21,427,221.20, 29,564,964.97 and 12,728,326.64

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Solution

The fourth proportional to 21,427,221.20, 29,564,964.97 and 12,728,326.64 is: 17,562,358.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,427,221.20 : 29,564,964.97 = 12,728,326.64 : x
  2. Step 2: Convert to fraction form
    21,427,221.20/29,564,964.97 = 12,728,326.64/x
  3. Step 3: Cross multiply
    21,427,221.20x = 29,564,964.97 × 12,728,326.64
  4. Step 4: Simplify right side
    21,427,221.20x = 376,312,531,058,672.19
  5. Step 5: Solve for x
    x = 376,312,531,058,672.19/21,427,221.20
  6. Step 6: Final answer
    x = 17,562,358.07

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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.