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Finding the Fourth Proportional to 19,391.60, 29,090.10 and 8,298.20

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Solution

The fourth proportional to 19,391.60, 29,090.10 and 8,298.20 is: 12,448.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,391.60 : 29,090.10 = 8,298.20 : x
  2. Step 2: Convert to fraction form
    19,391.60/29,090.10 = 8,298.20/x
  3. Step 3: Cross multiply
    19,391.60x = 29,090.10 × 8,298.20
  4. Step 4: Simplify right side
    19,391.60x = 241,395,467.82
  5. Step 5: Solve for x
    x = 241,395,467.82/19,391.60
  6. Step 6: Final answer
    x = 12,448.46

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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.