Home / 12,817.13-19,221.92-5,421.43

Finding the Fourth Proportional to 12,817.13, 19,221.92 and 5,421.43

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Solution

The fourth proportional to 12,817.13, 19,221.92 and 5,421.43 is: 8,130.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,817.13 : 19,221.92 = 5,421.43 : x
  2. Step 2: Convert to fraction form
    12,817.13/19,221.92 = 5,421.43/x
  3. Step 3: Cross multiply
    12,817.13x = 19,221.92 × 5,421.43
  4. Step 4: Simplify right side
    12,817.13x = 104,210,170.53
  5. Step 5: Solve for x
    x = 104,210,170.53/12,817.13
  6. Step 6: Final answer
    x = 8,130.54

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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.