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Finding the Fourth Proportional to 13,595.65, 20,385.15 and 12,435.42

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Solution

The fourth proportional to 13,595.65, 20,385.15 and 12,435.42 is: 18,645.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,595.65 : 20,385.15 = 12,435.42 : x
  2. Step 2: Convert to fraction form
    13,595.65/20,385.15 = 12,435.42/x
  3. Step 3: Cross multiply
    13,595.65x = 20,385.15 × 12,435.42
  4. Step 4: Simplify right side
    13,595.65x = 253,497,902.01
  5. Step 5: Solve for x
    x = 253,497,902.01/13,595.65
  6. Step 6: Final answer
    x = 18,645.52

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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.