Home / 21,167.08-31,750.42-12,849.40

Finding the Fourth Proportional to 21,167.08, 31,750.42 and 12,849.40

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Solution

The fourth proportional to 21,167.08, 31,750.42 and 12,849.40 is: 19,273.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,167.08 : 31,750.42 = 12,849.40 : x
  2. Step 2: Convert to fraction form
    21,167.08/31,750.42 = 12,849.40/x
  3. Step 3: Cross multiply
    21,167.08x = 31,750.42 × 12,849.40
  4. Step 4: Simplify right side
    21,167.08x = 407,973,846.75
  5. Step 5: Solve for x
    x = 407,973,846.75/21,167.08
  6. Step 6: Final answer
    x = 19,273.98

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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.