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Finding the Fourth Proportional to 11,865.42, 16,355.43 and 9,343.53

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Solution

The fourth proportional to 11,865.42, 16,355.43 and 9,343.53 is: 12,879.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,865.42 : 16,355.43 = 9,343.53 : x
  2. Step 2: Convert to fraction form
    11,865.42/16,355.43 = 9,343.53/x
  3. Step 3: Cross multiply
    11,865.42x = 16,355.43 × 9,343.53
  4. Step 4: Simplify right side
    11,865.42x = 152,817,450.87
  5. Step 5: Solve for x
    x = 152,817,450.87/11,865.42
  6. Step 6: Final answer
    x = 12,879.23

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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.