Home / 20,918.60-31,382.16-18,827.24

Finding the Fourth Proportional to 20,918.60, 31,382.16 and 18,827.24

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Solution

The fourth proportional to 20,918.60, 31,382.16 and 18,827.24 is: 28,244.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,918.60 : 31,382.16 = 18,827.24 : x
  2. Step 2: Convert to fraction form
    20,918.60/31,382.16 = 18,827.24/x
  3. Step 3: Cross multiply
    20,918.60x = 31,382.16 × 18,827.24
  4. Step 4: Simplify right side
    20,918.60x = 590,839,458.04
  5. Step 5: Solve for x
    x = 590,839,458.04/20,918.60
  6. Step 6: Final answer
    x = 28,244.69

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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.