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Finding the Fourth Proportional to 9,779.40, 13,496.49 and 5,531.40

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Solution

The fourth proportional to 9,779.40, 13,496.49 and 5,531.40 is: 7,633.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,779.40 : 13,496.49 = 5,531.40 : x
  2. Step 2: Convert to fraction form
    9,779.40/13,496.49 = 5,531.40/x
  3. Step 3: Cross multiply
    9,779.40x = 13,496.49 × 5,531.40
  4. Step 4: Simplify right side
    9,779.40x = 74,654,484.79
  5. Step 5: Solve for x
    x = 74,654,484.79/9,779.40
  6. Step 6: Final answer
    x = 7,633.85

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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.