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Finding the Fourth Proportional to 13,969.15, 20,929.35 and 11,644.10

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Solution

The fourth proportional to 13,969.15, 20,929.35 and 11,644.10 is: 17,445.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,969.15 : 20,929.35 = 11,644.10 : x
  2. Step 2: Convert to fraction form
    13,969.15/20,929.35 = 11,644.10/x
  3. Step 3: Cross multiply
    13,969.15x = 20,929.35 × 11,644.10
  4. Step 4: Simplify right side
    13,969.15x = 243,703,339.69
  5. Step 5: Solve for x
    x = 243,703,339.69/13,969.15
  6. Step 6: Final answer
    x = 17,445.83

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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.