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Finding the Fourth Proportional to 13,670.42, 20,505.63 and 9,782.42

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Solution

The fourth proportional to 13,670.42, 20,505.63 and 9,782.42 is: 14,673.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,670.42 : 20,505.63 = 9,782.42 : x
  2. Step 2: Convert to fraction form
    13,670.42/20,505.63 = 9,782.42/x
  3. Step 3: Cross multiply
    13,670.42x = 20,505.63 × 9,782.42
  4. Step 4: Simplify right side
    13,670.42x = 200,594,685.02
  5. Step 5: Solve for x
    x = 200,594,685.02/13,670.42
  6. Step 6: Final answer
    x = 14,673.63

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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.