Home / 13,785.40-20,678.10-5,020.60

Finding the Fourth Proportional to 13,785.40, 20,678.10 and 5,020.60

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Solution

The fourth proportional to 13,785.40, 20,678.10 and 5,020.60 is: 7,530.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,785.40 : 20,678.10 = 5,020.60 : x
  2. Step 2: Convert to fraction form
    13,785.40/20,678.10 = 5,020.60/x
  3. Step 3: Cross multiply
    13,785.40x = 20,678.10 × 5,020.60
  4. Step 4: Simplify right side
    13,785.40x = 103,816,468.86
  5. Step 5: Solve for x
    x = 103,816,468.86/13,785.40
  6. Step 6: Final answer
    x = 7,530.90

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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.