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Finding the Fourth Proportional to 13,491.60, 18,619.08 and 7,523.16

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Solution

The fourth proportional to 13,491.60, 18,619.08 and 7,523.16 is: 10,382.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,491.60 : 18,619.08 = 7,523.16 : x
  2. Step 2: Convert to fraction form
    13,491.60/18,619.08 = 7,523.16/x
  3. Step 3: Cross multiply
    13,491.60x = 18,619.08 × 7,523.16
  4. Step 4: Simplify right side
    13,491.60x = 140,074,317.89
  5. Step 5: Solve for x
    x = 140,074,317.89/13,491.60
  6. Step 6: Final answer
    x = 10,382.34

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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.