Home / 5,178.32-7,146.24-2,820.32

Finding the Fourth Proportional to 5,178.32, 7,146.24 and 2,820.32

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Solution

The fourth proportional to 5,178.32, 7,146.24 and 2,820.32 is: 3,892.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,178.32 : 7,146.24 = 2,820.32 : x
  2. Step 2: Convert to fraction form
    5,178.32/7,146.24 = 2,820.32/x
  3. Step 3: Cross multiply
    5,178.32x = 7,146.24 × 2,820.32
  4. Step 4: Simplify right side
    5,178.32x = 20,154,683.60
  5. Step 5: Solve for x
    x = 20,154,683.60/5,178.32
  6. Step 6: Final answer
    x = 3,892.13

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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.