Home / 20,869.04-31,307.21-9,181.96

Finding the Fourth Proportional to 20,869.04, 31,307.21 and 9,181.96

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Solution

The fourth proportional to 20,869.04, 31,307.21 and 9,181.96 is: 13,774.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,869.04 : 31,307.21 = 9,181.96 : x
  2. Step 2: Convert to fraction form
    20,869.04/31,307.21 = 9,181.96/x
  3. Step 3: Cross multiply
    20,869.04x = 31,307.21 × 9,181.96
  4. Step 4: Simplify right side
    20,869.04x = 287,461,441.21
  5. Step 5: Solve for x
    x = 287,461,441.21/20,869.04
  6. Step 6: Final answer
    x = 13,774.54

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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.