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Finding the Fourth Proportional to 13,424.10, 18,529.48 and 8,644.10

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Solution

The fourth proportional to 13,424.10, 18,529.48 and 8,644.10 is: 11,931.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,424.10 : 18,529.48 = 8,644.10 : x
  2. Step 2: Convert to fraction form
    13,424.10/18,529.48 = 8,644.10/x
  3. Step 3: Cross multiply
    13,424.10x = 18,529.48 × 8,644.10
  4. Step 4: Simplify right side
    13,424.10x = 160,170,678.07
  5. Step 5: Solve for x
    x = 160,170,678.07/13,424.10
  6. Step 6: Final answer
    x = 11,931.58

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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.