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Finding the Fourth Proportional to 12,573.80, 18,860.06 and 4,257.80

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Solution

The fourth proportional to 12,573.80, 18,860.06 and 4,257.80 is: 6,386.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,573.80 : 18,860.06 = 4,257.80 : x
  2. Step 2: Convert to fraction form
    12,573.80/18,860.06 = 4,257.80/x
  3. Step 3: Cross multiply
    12,573.80x = 18,860.06 × 4,257.80
  4. Step 4: Simplify right side
    12,573.80x = 80,302,363.47
  5. Step 5: Solve for x
    x = 80,302,363.47/12,573.80
  6. Step 6: Final answer
    x = 6,386.48

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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.