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Finding the Fourth Proportional to 13,641.42, 18,779.67 and 13,014.48

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Solution

The fourth proportional to 13,641.42, 18,779.67 and 13,014.48 is: 17,916.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,641.42 : 18,779.67 = 13,014.48 : x
  2. Step 2: Convert to fraction form
    13,641.42/18,779.67 = 13,014.48/x
  3. Step 3: Cross multiply
    13,641.42x = 18,779.67 × 13,014.48
  4. Step 4: Simplify right side
    13,641.42x = 244,407,639.62
  5. Step 5: Solve for x
    x = 244,407,639.62/13,641.42
  6. Step 6: Final answer
    x = 17,916.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.