Home / 21,009.15-31,513.73-11,167.65

Finding the Fourth Proportional to 21,009.15, 31,513.73 and 11,167.65

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Solution

The fourth proportional to 21,009.15, 31,513.73 and 11,167.65 is: 16,751.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,009.15 : 31,513.73 = 11,167.65 : x
  2. Step 2: Convert to fraction form
    21,009.15/31,513.73 = 11,167.65/x
  3. Step 3: Cross multiply
    21,009.15x = 31,513.73 × 11,167.65
  4. Step 4: Simplify right side
    21,009.15x = 351,934,251.00
  5. Step 5: Solve for x
    x = 351,934,251.00/21,009.15
  6. Step 6: Final answer
    x = 16,751.48

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1.5x scale

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.