Home / 7,857.40-10,854.96-5,174.98

Finding the Fourth Proportional to 7,857.40, 10,854.96 and 5,174.98

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Solution

The fourth proportional to 7,857.40, 10,854.96 and 5,174.98 is: 7,149.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,857.40 : 10,854.96 = 5,174.98 : x
  2. Step 2: Convert to fraction form
    7,857.40/10,854.96 = 5,174.98/x
  3. Step 3: Cross multiply
    7,857.40x = 10,854.96 × 5,174.98
  4. Step 4: Simplify right side
    7,857.40x = 56,174,200.90
  5. Step 5: Solve for x
    x = 56,174,200.90/7,857.40
  6. Step 6: Final answer
    x = 7,149.21

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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.