Home / 7,130.07-10,686.20-3,431.31

Finding the Fourth Proportional to 7,130.07, 10,686.20 and 3,431.31

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Solution

The fourth proportional to 7,130.07, 10,686.20 and 3,431.31 is: 5,142.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,130.07 : 10,686.20 = 3,431.31 : x
  2. Step 2: Convert to fraction form
    7,130.07/10,686.20 = 3,431.31/x
  3. Step 3: Cross multiply
    7,130.07x = 10,686.20 × 3,431.31
  4. Step 4: Simplify right side
    7,130.07x = 36,667,647.77
  5. Step 5: Solve for x
    x = 36,667,647.77/7,130.07
  6. Step 6: Final answer
    x = 5,142.68

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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.