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Finding the Fourth Proportional to 12,709.80, 17,539.07 and 7,044.80

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Solution

The fourth proportional to 12,709.80, 17,539.07 and 7,044.80 is: 9,721.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,709.80 : 17,539.07 = 7,044.80 : x
  2. Step 2: Convert to fraction form
    12,709.80/17,539.07 = 7,044.80/x
  3. Step 3: Cross multiply
    12,709.80x = 17,539.07 × 7,044.80
  4. Step 4: Simplify right side
    12,709.80x = 123,559,117.42
  5. Step 5: Solve for x
    x = 123,559,117.42/12,709.80
  6. Step 6: Final answer
    x = 9,721.56

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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.