Home / 21,029.46-31,589.98-12,713.40

Finding the Fourth Proportional to 21,029.46, 31,589.98 and 12,713.40

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Solution

The fourth proportional to 21,029.46, 31,589.98 and 12,713.40 is: 19,097.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,029.46 : 31,589.98 = 12,713.40 : x
  2. Step 2: Convert to fraction form
    21,029.46/31,589.98 = 12,713.40/x
  3. Step 3: Cross multiply
    21,029.46x = 31,589.98 × 12,713.40
  4. Step 4: Simplify right side
    21,029.46x = 401,615,893.78
  5. Step 5: Solve for x
    x = 401,615,893.78/21,029.46
  6. Step 6: Final answer
    x = 19,097.77

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.