Home / 21,137.40-29,167.58-12,637.82

Finding the Fourth Proportional to 21,137.40, 29,167.58 and 12,637.82

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Solution

The fourth proportional to 21,137.40, 29,167.58 and 12,637.82 is: 17,438.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,137.40 : 29,167.58 = 12,637.82 : x
  2. Step 2: Convert to fraction form
    21,137.40/29,167.58 = 12,637.82/x
  3. Step 3: Cross multiply
    21,137.40x = 29,167.58 × 12,637.82
  4. Step 4: Simplify right side
    21,137.40x = 368,614,730.39
  5. Step 5: Solve for x
    x = 368,614,730.39/21,137.40
  6. Step 6: Final answer
    x = 17,438.98

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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.