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Finding the Fourth Proportional to 10,955.60, 16,440.60 and 5,412.68

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Solution

The fourth proportional to 10,955.60, 16,440.60 and 5,412.68 is: 8,122.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,955.60 : 16,440.60 = 5,412.68 : x
  2. Step 2: Convert to fraction form
    10,955.60/16,440.60 = 5,412.68/x
  3. Step 3: Cross multiply
    10,955.60x = 16,440.60 × 5,412.68
  4. Step 4: Simplify right side
    10,955.60x = 88,987,706.81
  5. Step 5: Solve for x
    x = 88,987,706.81/10,955.60
  6. Step 6: Final answer
    x = 8,122.58

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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.