Home / 5,138.70-7,708.01-1,243.10

Finding the Fourth Proportional to 5,138.70, 7,708.01 and 1,243.10

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Solution

The fourth proportional to 5,138.70, 7,708.01 and 1,243.10 is: 1,864.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,138.70 : 7,708.01 = 1,243.10 : x
  2. Step 2: Convert to fraction form
    5,138.70/7,708.01 = 1,243.10/x
  3. Step 3: Cross multiply
    5,138.70x = 7,708.01 × 1,243.10
  4. Step 4: Simplify right side
    5,138.70x = 9,581,827.23
  5. Step 5: Solve for x
    x = 9,581,827.23/5,138.70
  6. Step 6: Final answer
    x = 1,864.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.