Home / 12,905.28-19,344.85-8,745.71

Finding the Fourth Proportional to 12,905.28, 19,344.85 and 8,745.71

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Solution

The fourth proportional to 12,905.28, 19,344.85 and 8,745.71 is: 13,109.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,905.28 : 19,344.85 = 8,745.71 : x
  2. Step 2: Convert to fraction form
    12,905.28/19,344.85 = 8,745.71/x
  3. Step 3: Cross multiply
    12,905.28x = 19,344.85 × 8,745.71
  4. Step 4: Simplify right side
    12,905.28x = 169,184,448.09
  5. Step 5: Solve for x
    x = 169,184,448.09/12,905.28
  6. Step 6: Final answer
    x = 13,109.71

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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.