Home / 15,891.36-21,930.48-8,817.90

Finding the Fourth Proportional to 15,891.36, 21,930.48 and 8,817.90

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Solution

The fourth proportional to 15,891.36, 21,930.48 and 8,817.90 is: 12,168.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,891.36 : 21,930.48 = 8,817.90 : x
  2. Step 2: Convert to fraction form
    15,891.36/21,930.48 = 8,817.90/x
  3. Step 3: Cross multiply
    15,891.36x = 21,930.48 × 8,817.90
  4. Step 4: Simplify right side
    15,891.36x = 193,380,779.59
  5. Step 5: Solve for x
    x = 193,380,779.59/15,891.36
  6. Step 6: Final answer
    x = 12,168.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.