Home / 13,815.55-20,730.62-6,419.85

Finding the Fourth Proportional to 13,815.55, 20,730.62 and 6,419.85

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Solution

The fourth proportional to 13,815.55, 20,730.62 and 6,419.85 is: 9,633.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,815.55 : 20,730.62 = 6,419.85 : x
  2. Step 2: Convert to fraction form
    13,815.55/20,730.62 = 6,419.85/x
  3. Step 3: Cross multiply
    13,815.55x = 20,730.62 × 6,419.85
  4. Step 4: Simplify right side
    13,815.55x = 133,087,470.81
  5. Step 5: Solve for x
    x = 133,087,470.81/13,815.55
  6. Step 6: Final answer
    x = 9,633.16

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1.5x scale

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.