Home / 8,419.34-12,628.95-2,178.81

Finding the Fourth Proportional to 8,419.34, 12,628.95 and 2,178.81

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Solution

The fourth proportional to 8,419.34, 12,628.95 and 2,178.81 is: 3,268.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,419.34 : 12,628.95 = 2,178.81 : x
  2. Step 2: Convert to fraction form
    8,419.34/12,628.95 = 2,178.81/x
  3. Step 3: Cross multiply
    8,419.34x = 12,628.95 × 2,178.81
  4. Step 4: Simplify right side
    8,419.34x = 27,516,082.55
  5. Step 5: Solve for x
    x = 27,516,082.55/8,419.34
  6. Step 6: Final answer
    x = 3,268.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.