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Finding the Fourth Proportional to 7,779.98, 10,736.18 and 4,243.12

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Solution

The fourth proportional to 7,779.98, 10,736.18 and 4,243.12 is: 5,855.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,779.98 : 10,736.18 = 4,243.12 : x
  2. Step 2: Convert to fraction form
    7,779.98/10,736.18 = 4,243.12/x
  3. Step 3: Cross multiply
    7,779.98x = 10,736.18 × 4,243.12
  4. Step 4: Simplify right side
    7,779.98x = 45,554,900.08
  5. Step 5: Solve for x
    x = 45,554,900.08/7,779.98
  6. Step 6: Final answer
    x = 5,855.40

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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.