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Finding the Fourth Proportional to 7,115.80, 9,770.03 and 5,779.30

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Solution

The fourth proportional to 7,115.80, 9,770.03 and 5,779.30 is: 7,935.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,115.80 : 9,770.03 = 5,779.30 : x
  2. Step 2: Convert to fraction form
    7,115.80/9,770.03 = 5,779.30/x
  3. Step 3: Cross multiply
    7,115.80x = 9,770.03 × 5,779.30
  4. Step 4: Simplify right side
    7,115.80x = 56,463,934.38
  5. Step 5: Solve for x
    x = 56,463,934.38/7,115.80
  6. Step 6: Final answer
    x = 7,935.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.