Home / 5,178.19-7,145.91-2,820.34

Finding the Fourth Proportional to 5,178.19, 7,145.91 and 2,820.34

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Solution

The fourth proportional to 5,178.19, 7,145.91 and 2,820.34 is: 3,892.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,178.19 : 7,145.91 = 2,820.34 : x
  2. Step 2: Convert to fraction form
    5,178.19/7,145.91 = 2,820.34/x
  3. Step 3: Cross multiply
    5,178.19x = 7,145.91 × 2,820.34
  4. Step 4: Simplify right side
    5,178.19x = 20,153,895.81
  5. Step 5: Solve for x
    x = 20,153,895.81/5,178.19
  6. Step 6: Final answer
    x = 3,892.07

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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.