Home / 12,729.21-19,091.33-6,402.40

Finding the Fourth Proportional to 12,729.21, 19,091.33 and 6,402.40

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Solution

The fourth proportional to 12,729.21, 19,091.33 and 6,402.40 is: 9,602.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,729.21 : 19,091.33 = 6,402.40 : x
  2. Step 2: Convert to fraction form
    12,729.21/19,091.33 = 6,402.40/x
  3. Step 3: Cross multiply
    12,729.21x = 19,091.33 × 6,402.40
  4. Step 4: Simplify right side
    12,729.21x = 122,230,299.47
  5. Step 5: Solve for x
    x = 122,230,299.47/12,729.21
  6. Step 6: Final answer
    x = 9,602.35

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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.