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Finding the Fourth Proportional to 12,573.40, 18,860.10 and 3,213.44

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Solution

The fourth proportional to 12,573.40, 18,860.10 and 3,213.44 is: 4,820.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,573.40 : 18,860.10 = 3,213.44 : x
  2. Step 2: Convert to fraction form
    12,573.40/18,860.10 = 3,213.44/x
  3. Step 3: Cross multiply
    12,573.40x = 18,860.10 × 3,213.44
  4. Step 4: Simplify right side
    12,573.40x = 60,605,799.74
  5. Step 5: Solve for x
    x = 60,605,799.74/12,573.40
  6. Step 6: Final answer
    x = 4,820.16

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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.