Home / 7,115.25-9,818.30-4,130.50

Finding the Fourth Proportional to 7,115.25, 9,818.30 and 4,130.50

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Solution

The fourth proportional to 7,115.25, 9,818.30 and 4,130.50 is: 5,699.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,115.25 : 9,818.30 = 4,130.50 : x
  2. Step 2: Convert to fraction form
    7,115.25/9,818.30 = 4,130.50/x
  3. Step 3: Cross multiply
    7,115.25x = 9,818.30 × 4,130.50
  4. Step 4: Simplify right side
    7,115.25x = 40,554,469.11
  5. Step 5: Solve for x
    x = 40,554,469.11/7,115.25
  6. Step 6: Final answer
    x = 5,699.66

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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.