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Finding the Fourth Proportional to 12,649.61, 18,971.16 and 3,762.63

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Solution

The fourth proportional to 12,649.61, 18,971.16 and 3,762.63 is: 5,642.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,649.61 : 18,971.16 = 3,762.63 : x
  2. Step 2: Convert to fraction form
    12,649.61/18,971.16 = 3,762.63/x
  3. Step 3: Cross multiply
    12,649.61x = 18,971.16 × 3,762.63
  4. Step 4: Simplify right side
    12,649.61x = 71,381,455.75
  5. Step 5: Solve for x
    x = 71,381,455.75/12,649.61
  6. Step 6: Final answer
    x = 5,642.98

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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.