Home / 13,415.12-20,121.76-4,055.40

Finding the Fourth Proportional to 13,415.12, 20,121.76 and 4,055.40

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Solution

The fourth proportional to 13,415.12, 20,121.76 and 4,055.40 is: 6,082.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,415.12 : 20,121.76 = 4,055.40 : x
  2. Step 2: Convert to fraction form
    13,415.12/20,121.76 = 4,055.40/x
  3. Step 3: Cross multiply
    13,415.12x = 20,121.76 × 4,055.40
  4. Step 4: Simplify right side
    13,415.12x = 81,601,785.50
  5. Step 5: Solve for x
    x = 81,601,785.50/13,415.12
  6. Step 6: Final answer
    x = 6,082.82

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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.