Home / 13,419.64-20,120.85-4,655.17

Finding the Fourth Proportional to 13,419.64, 20,120.85 and 4,655.17

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Solution

The fourth proportional to 13,419.64, 20,120.85 and 4,655.17 is: 6,979.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,419.64 : 20,120.85 = 4,655.17 : x
  2. Step 2: Convert to fraction form
    13,419.64/20,120.85 = 4,655.17/x
  3. Step 3: Cross multiply
    13,419.64x = 20,120.85 × 4,655.17
  4. Step 4: Simplify right side
    13,419.64x = 93,665,977.29
  5. Step 5: Solve for x
    x = 93,665,977.29/13,419.64
  6. Step 6: Final answer
    x = 6,979.77

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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.