Home / 9,172.86-12,657.44-5,139.90

Finding the Fourth Proportional to 9,172.86, 12,657.44 and 5,139.90

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Solution

The fourth proportional to 9,172.86, 12,657.44 and 5,139.90 is: 7,092.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,172.86 : 12,657.44 = 5,139.90 : x
  2. Step 2: Convert to fraction form
    9,172.86/12,657.44 = 5,139.90/x
  3. Step 3: Cross multiply
    9,172.86x = 12,657.44 × 5,139.90
  4. Step 4: Simplify right side
    9,172.86x = 65,057,975.86
  5. Step 5: Solve for x
    x = 65,057,975.86/9,172.86
  6. Step 6: Final answer
    x = 7,092.44

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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.