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Finding the Fourth Proportional to 12,679.58, 17,497.77 and 7,642.85

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Solution

The fourth proportional to 12,679.58, 17,497.77 and 7,642.85 is: 10,547.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,679.58 : 17,497.77 = 7,642.85 : x
  2. Step 2: Convert to fraction form
    12,679.58/17,497.77 = 7,642.85/x
  3. Step 3: Cross multiply
    12,679.58x = 17,497.77 × 7,642.85
  4. Step 4: Simplify right side
    12,679.58x = 133,732,743.96
  5. Step 5: Solve for x
    x = 133,732,743.96/12,679.58
  6. Step 6: Final answer
    x = 10,547.10

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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.