Home / 31,189.86-46,784.39-21,169.76

Finding the Fourth Proportional to 31,189.86, 46,784.39 and 21,169.76

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Solution

The fourth proportional to 31,189.86, 46,784.39 and 21,169.76 is: 31,754.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,189.86 : 46,784.39 = 21,169.76 : x
  2. Step 2: Convert to fraction form
    31,189.86/46,784.39 = 21,169.76/x
  3. Step 3: Cross multiply
    31,189.86x = 46,784.39 × 21,169.76
  4. Step 4: Simplify right side
    31,189.86x = 990,413,968.28
  5. Step 5: Solve for x
    x = 990,413,968.28/31,189.86
  6. Step 6: Final answer
    x = 31,754.36

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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.