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Finding the Fourth Proportional to 13,015.53, 17,959.50 and 7,908.39

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Solution

The fourth proportional to 13,015.53, 17,959.50 and 7,908.39 is: 10,912.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,015.53 : 17,959.50 = 7,908.39 : x
  2. Step 2: Convert to fraction form
    13,015.53/17,959.50 = 7,908.39/x
  3. Step 3: Cross multiply
    13,015.53x = 17,959.50 × 7,908.39
  4. Step 4: Simplify right side
    13,015.53x = 142,030,730.21
  5. Step 5: Solve for x
    x = 142,030,730.21/13,015.53
  6. Step 6: Final answer
    x = 10,912.40

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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.