Home / 21,137.31-29,139.35-15,167.07

Finding the Fourth Proportional to 21,137.31, 29,139.35 and 15,167.07

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Solution

The fourth proportional to 21,137.31, 29,139.35 and 15,167.07 is: 20,908.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,137.31 : 29,139.35 = 15,167.07 : x
  2. Step 2: Convert to fraction form
    21,137.31/29,139.35 = 15,167.07/x
  3. Step 3: Cross multiply
    21,137.31x = 29,139.35 × 15,167.07
  4. Step 4: Simplify right side
    21,137.31x = 441,958,485.37
  5. Step 5: Solve for x
    x = 441,958,485.37/21,137.31
  6. Step 6: Final answer
    x = 20,908.93

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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.