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Finding the Fourth Proportional to 7,779.77, 10,736.03 and 4,242.90

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Solution

The fourth proportional to 7,779.77, 10,736.03 and 4,242.90 is: 5,855.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,779.77 : 10,736.03 = 4,242.90 : x
  2. Step 2: Convert to fraction form
    7,779.77/10,736.03 = 4,242.90/x
  3. Step 3: Cross multiply
    7,779.77x = 10,736.03 × 4,242.90
  4. Step 4: Simplify right side
    7,779.77x = 45,551,880.47
  5. Step 5: Solve for x
    x = 45,551,880.47/7,779.77
  6. Step 6: Final answer
    x = 5,855.17

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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.