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Finding the Fourth Proportional to 14,315.68, 19,755.86 and 8,649.64

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Solution

The fourth proportional to 14,315.68, 19,755.86 and 8,649.64 is: 11,936.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,315.68 : 19,755.86 = 8,649.64 : x
  2. Step 2: Convert to fraction form
    14,315.68/19,755.86 = 8,649.64/x
  3. Step 3: Cross multiply
    14,315.68x = 19,755.86 × 8,649.64
  4. Step 4: Simplify right side
    14,315.68x = 170,881,076.89
  5. Step 5: Solve for x
    x = 170,881,076.89/14,315.68
  6. Step 6: Final answer
    x = 11,936.64

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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.