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Finding the Fourth Proportional to 10,626.61, 15,921.44 and 7,457.32

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Solution

The fourth proportional to 10,626.61, 15,921.44 and 7,457.32 is: 11,173.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,626.61 : 15,921.44 = 7,457.32 : x
  2. Step 2: Convert to fraction form
    10,626.61/15,921.44 = 7,457.32/x
  3. Step 3: Cross multiply
    10,626.61x = 15,921.44 × 7,457.32
  4. Step 4: Simplify right side
    10,626.61x = 118,731,275.46
  5. Step 5: Solve for x
    x = 118,731,275.46/10,626.61
  6. Step 6: Final answer
    x = 11,173.02

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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.