Home / 7,143.28-9,860.40-6,395.92

Finding the Fourth Proportional to 7,143.28, 9,860.40 and 6,395.92

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Solution

The fourth proportional to 7,143.28, 9,860.40 and 6,395.92 is: 8,828.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,143.28 : 9,860.40 = 6,395.92 : x
  2. Step 2: Convert to fraction form
    7,143.28/9,860.40 = 6,395.92/x
  3. Step 3: Cross multiply
    7,143.28x = 9,860.40 × 6,395.92
  4. Step 4: Simplify right side
    7,143.28x = 63,066,329.57
  5. Step 5: Solve for x
    x = 63,066,329.57/7,143.28
  6. Step 6: Final answer
    x = 8,828.76

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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.