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Finding the Fourth Proportional to 12,649.80, 17,449.47 and 7,343.94

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Solution

The fourth proportional to 12,649.80, 17,449.47 and 7,343.94 is: 10,130.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,649.80 : 17,449.47 = 7,343.94 : x
  2. Step 2: Convert to fraction form
    12,649.80/17,449.47 = 7,343.94/x
  3. Step 3: Cross multiply
    12,649.80x = 17,449.47 × 7,343.94
  4. Step 4: Simplify right side
    12,649.80x = 128,147,860.71
  5. Step 5: Solve for x
    x = 128,147,860.71/12,649.80
  6. Step 6: Final answer
    x = 10,130.43

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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.