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Finding the Fourth Proportional to 14,611.60, 21,917.40 and 4,751.20

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Solution

The fourth proportional to 14,611.60, 21,917.40 and 4,751.20 is: 7,126.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,611.60 : 21,917.40 = 4,751.20 : x
  2. Step 2: Convert to fraction form
    14,611.60/21,917.40 = 4,751.20/x
  3. Step 3: Cross multiply
    14,611.60x = 21,917.40 × 4,751.20
  4. Step 4: Simplify right side
    14,611.60x = 104,133,950.88
  5. Step 5: Solve for x
    x = 104,133,950.88/14,611.60
  6. Step 6: Final answer
    x = 7,126.80

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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.