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Finding the Fourth Proportional to 13,959.69, 19,265.24 and 7,991.24

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Solution

The fourth proportional to 13,959.69, 19,265.24 and 7,991.24 is: 11,028.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,959.69 : 19,265.24 = 7,991.24 : x
  2. Step 2: Convert to fraction form
    13,959.69/19,265.24 = 7,991.24/x
  3. Step 3: Cross multiply
    13,959.69x = 19,265.24 × 7,991.24
  4. Step 4: Simplify right side
    13,959.69x = 153,953,020.22
  5. Step 5: Solve for x
    x = 153,953,020.22/13,959.69
  6. Step 6: Final answer
    x = 11,028.40

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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.