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Finding the Fourth Proportional to 15,035.51, 20,748.48 and 8,321.42

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Solution

The fourth proportional to 15,035.51, 20,748.48 and 8,321.42 is: 11,483.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,035.51 : 20,748.48 = 8,321.42 : x
  2. Step 2: Convert to fraction form
    15,035.51/20,748.48 = 8,321.42/x
  3. Step 3: Cross multiply
    15,035.51x = 20,748.48 × 8,321.42
  4. Step 4: Simplify right side
    15,035.51x = 172,656,712.70
  5. Step 5: Solve for x
    x = 172,656,712.70/15,035.51
  6. Step 6: Final answer
    x = 11,483.27

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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.