Home / 5,186.15-7,156.65-3,172.91

Finding the Fourth Proportional to 5,186.15, 7,156.65 and 3,172.91

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Solution

The fourth proportional to 5,186.15, 7,156.65 and 3,172.91 is: 4,378.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,186.15 : 7,156.65 = 3,172.91 : x
  2. Step 2: Convert to fraction form
    5,186.15/7,156.65 = 3,172.91/x
  3. Step 3: Cross multiply
    5,186.15x = 7,156.65 × 3,172.91
  4. Step 4: Simplify right side
    5,186.15x = 22,707,416.08
  5. Step 5: Solve for x
    x = 22,707,416.08/5,186.15
  6. Step 6: Final answer
    x = 4,378.47

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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.