Home / 13,511.21-20,289.29-8,349.89

Finding the Fourth Proportional to 13,511.21, 20,289.29 and 8,349.89

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Solution

The fourth proportional to 13,511.21, 20,289.29 and 8,349.89 is: 12,538.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,511.21 : 20,289.29 = 8,349.89 : x
  2. Step 2: Convert to fraction form
    13,511.21/20,289.29 = 8,349.89/x
  3. Step 3: Cross multiply
    13,511.21x = 20,289.29 × 8,349.89
  4. Step 4: Simplify right side
    13,511.21x = 169,413,196.48
  5. Step 5: Solve for x
    x = 169,413,196.48/13,511.21
  6. Step 6: Final answer
    x = 12,538.72

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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.