Home / 13,421.31-20,132.39-6,402.09

Finding the Fourth Proportional to 13,421.31, 20,132.39 and 6,402.09

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Solution

The fourth proportional to 13,421.31, 20,132.39 and 6,402.09 is: 9,603.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,421.31 : 20,132.39 = 6,402.09 : x
  2. Step 2: Convert to fraction form
    13,421.31/20,132.39 = 6,402.09/x
  3. Step 3: Cross multiply
    13,421.31x = 20,132.39 × 6,402.09
  4. Step 4: Simplify right side
    13,421.31x = 128,889,240.02
  5. Step 5: Solve for x
    x = 128,889,240.02/13,421.31
  6. Step 6: Final answer
    x = 9,603.33

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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.