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Finding the Fourth Proportional to 13,028.79, 17,979.74 and 7,060.40

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Solution

The fourth proportional to 13,028.79, 17,979.74 and 7,060.40 is: 9,743.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,028.79 : 17,979.74 = 7,060.40 : x
  2. Step 2: Convert to fraction form
    13,028.79/17,979.74 = 7,060.40/x
  3. Step 3: Cross multiply
    13,028.79x = 17,979.74 × 7,060.40
  4. Step 4: Simplify right side
    13,028.79x = 126,944,215.74
  5. Step 5: Solve for x
    x = 126,944,215.74/13,028.79
  6. Step 6: Final answer
    x = 9,743.36

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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.