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Finding the Fourth Proportional to 13,343.60, 18,412.88 and 7,374.30

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Solution

The fourth proportional to 13,343.60, 18,412.88 and 7,374.30 is: 10,175.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,343.60 : 18,412.88 = 7,374.30 : x
  2. Step 2: Convert to fraction form
    13,343.60/18,412.88 = 7,374.30/x
  3. Step 3: Cross multiply
    13,343.60x = 18,412.88 × 7,374.30
  4. Step 4: Simplify right side
    13,343.60x = 135,782,064.11
  5. Step 5: Solve for x
    x = 135,782,064.11/13,343.60
  6. Step 6: Final answer
    x = 10,175.82

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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.