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Finding the Fourth Proportional to 6,992.80, 10,425.80 and 6,810.40

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Solution

The fourth proportional to 6,992.80, 10,425.80 and 6,810.40 is: 10,153.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,992.80 : 10,425.80 = 6,810.40 : x
  2. Step 2: Convert to fraction form
    6,992.80/10,425.80 = 6,810.40/x
  3. Step 3: Cross multiply
    6,992.80x = 10,425.80 × 6,810.40
  4. Step 4: Simplify right side
    6,992.80x = 71,003,868.32
  5. Step 5: Solve for x
    x = 71,003,868.32/6,992.80
  6. Step 6: Final answer
    x = 10,153.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.