Home / 31,145.60-46,718.40-17,991.20

Finding the Fourth Proportional to 31,145.60, 46,718.40 and 17,991.20

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Solution

The fourth proportional to 31,145.60, 46,718.40 and 17,991.20 is: 26,986.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,145.60 : 46,718.40 = 17,991.20 : x
  2. Step 2: Convert to fraction form
    31,145.60/46,718.40 = 17,991.20/x
  3. Step 3: Cross multiply
    31,145.60x = 46,718.40 × 17,991.20
  4. Step 4: Simplify right side
    31,145.60x = 840,520,078.08
  5. Step 5: Solve for x
    x = 840,520,078.08/31,145.60
  6. Step 6: Final answer
    x = 26,986.80

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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.