Home / 20,918.16-31,354.56-9,817.92

Finding the Fourth Proportional to 20,918.16, 31,354.56 and 9,817.92

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Solution

The fourth proportional to 20,918.16, 31,354.56 and 9,817.92 is: 14,716.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,918.16 : 31,354.56 = 9,817.92 : x
  2. Step 2: Convert to fraction form
    20,918.16/31,354.56 = 9,817.92/x
  3. Step 3: Cross multiply
    20,918.16x = 31,354.56 × 9,817.92
  4. Step 4: Simplify right side
    20,918.16x = 307,836,561.72
  5. Step 5: Solve for x
    x = 307,836,561.72/20,918.16
  6. Step 6: Final answer
    x = 14,716.24

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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.