Home / 7,142.40-9,857.68-4,270.94

Finding the Fourth Proportional to 7,142.40, 9,857.68 and 4,270.94

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Solution

The fourth proportional to 7,142.40, 9,857.68 and 4,270.94 is: 5,894.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,142.40 : 9,857.68 = 4,270.94 : x
  2. Step 2: Convert to fraction form
    7,142.40/9,857.68 = 4,270.94/x
  3. Step 3: Cross multiply
    7,142.40x = 9,857.68 × 4,270.94
  4. Step 4: Simplify right side
    7,142.40x = 42,101,559.82
  5. Step 5: Solve for x
    x = 42,101,559.82/7,142.40
  6. Step 6: Final answer
    x = 5,894.60

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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.