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Finding the Fourth Proportional to 13,048.11, 18,005.90 and 7,079.58

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Solution

The fourth proportional to 13,048.11, 18,005.90 and 7,079.58 is: 9,769.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,048.11 : 18,005.90 = 7,079.58 : x
  2. Step 2: Convert to fraction form
    13,048.11/18,005.90 = 7,079.58/x
  3. Step 3: Cross multiply
    13,048.11x = 18,005.90 × 7,079.58
  4. Step 4: Simplify right side
    13,048.11x = 127,474,174.12
  5. Step 5: Solve for x
    x = 127,474,174.12/13,048.11
  6. Step 6: Final answer
    x = 9,769.55

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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.