Home / 13,429.60-20,128.20-6,852.40

Finding the Fourth Proportional to 13,429.60, 20,128.20 and 6,852.40

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Solution

The fourth proportional to 13,429.60, 20,128.20 and 6,852.40 is: 10,270.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,429.60 : 20,128.20 = 6,852.40 : x
  2. Step 2: Convert to fraction form
    13,429.60/20,128.20 = 6,852.40/x
  3. Step 3: Cross multiply
    13,429.60x = 20,128.20 × 6,852.40
  4. Step 4: Simplify right side
    13,429.60x = 137,926,477.68
  5. Step 5: Solve for x
    x = 137,926,477.68/13,429.60
  6. Step 6: Final answer
    x = 10,270.33

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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.