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Finding the Fourth Proportional to 9,779.38, 13,495.36 and 5,530.38

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Solution

The fourth proportional to 9,779.38, 13,495.36 and 5,530.38 is: 7,631.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,779.38 : 13,495.36 = 5,530.38 : x
  2. Step 2: Convert to fraction form
    9,779.38/13,495.36 = 5,530.38/x
  3. Step 3: Cross multiply
    9,779.38x = 13,495.36 × 5,530.38
  4. Step 4: Simplify right side
    9,779.38x = 74,634,469.04
  5. Step 5: Solve for x
    x = 74,634,469.04/9,779.38
  6. Step 6: Final answer
    x = 7,631.82

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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.