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Finding the Fourth Proportional to 13,008.51, 17,959.47 and 8,540.07

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Solution

The fourth proportional to 13,008.51, 17,959.47 and 8,540.07 is: 11,790.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,008.51 : 17,959.47 = 8,540.07 : x
  2. Step 2: Convert to fraction form
    13,008.51/17,959.47 = 8,540.07/x
  3. Step 3: Cross multiply
    13,008.51x = 17,959.47 × 8,540.07
  4. Step 4: Simplify right side
    13,008.51x = 153,375,130.96
  5. Step 5: Solve for x
    x = 153,375,130.96/13,008.51
  6. Step 6: Final answer
    x = 11,790.37

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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.