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Finding the Fourth Proportional to 13,048.79, 18,007.20 and 7,080.39

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Solution

The fourth proportional to 13,048.79, 18,007.20 and 7,080.39 is: 9,770.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,048.79 : 18,007.20 = 7,080.39 : x
  2. Step 2: Convert to fraction form
    13,048.79/18,007.20 = 7,080.39/x
  3. Step 3: Cross multiply
    13,048.79x = 18,007.20 × 7,080.39
  4. Step 4: Simplify right side
    13,048.79x = 127,497,998.81
  5. Step 5: Solve for x
    x = 127,497,998.81/13,048.79
  6. Step 6: Final answer
    x = 9,770.87

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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.