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Finding the Fourth Proportional to 7,779.15, 11,658.29 and 7,280.93

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Solution

The fourth proportional to 7,779.15, 11,658.29 and 7,280.93 is: 10,911.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,779.15 : 11,658.29 = 7,280.93 : x
  2. Step 2: Convert to fraction form
    7,779.15/11,658.29 = 7,280.93/x
  3. Step 3: Cross multiply
    7,779.15x = 11,658.29 × 7,280.93
  4. Step 4: Simplify right side
    7,779.15x = 84,883,186.15
  5. Step 5: Solve for x
    x = 84,883,186.15/7,779.15
  6. Step 6: Final answer
    x = 10,911.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.