Home / 21,214.48-31,821.80-7,174.58

Finding the Fourth Proportional to 21,214.48, 31,821.80 and 7,174.58

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Solution

The fourth proportional to 21,214.48, 31,821.80 and 7,174.58 is: 10,761.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,214.48 : 31,821.80 = 7,174.58 : x
  2. Step 2: Convert to fraction form
    21,214.48/31,821.80 = 7,174.58/x
  3. Step 3: Cross multiply
    21,214.48x = 31,821.80 × 7,174.58
  4. Step 4: Simplify right side
    21,214.48x = 228,307,890.74
  5. Step 5: Solve for x
    x = 228,307,890.74/21,214.48
  6. Step 6: Final answer
    x = 10,761.89

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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.