Home / 10,109.76-13,949.43-6,128.55

Finding the Fourth Proportional to 10,109.76, 13,949.43 and 6,128.55

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Solution

The fourth proportional to 10,109.76, 13,949.43 and 6,128.55 is: 8,456.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,109.76 : 13,949.43 = 6,128.55 : x
  2. Step 2: Convert to fraction form
    10,109.76/13,949.43 = 6,128.55/x
  3. Step 3: Cross multiply
    10,109.76x = 13,949.43 × 6,128.55
  4. Step 4: Simplify right side
    10,109.76x = 85,489,779.23
  5. Step 5: Solve for x
    x = 85,489,779.23/10,109.76
  6. Step 6: Final answer
    x = 8,456.16

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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.