Home / 7,678.96-11,500.12-4,748.36

Finding the Fourth Proportional to 7,678.96, 11,500.12 and 4,748.36

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Solution

The fourth proportional to 7,678.96, 11,500.12 and 4,748.36 is: 7,111.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,678.96 : 11,500.12 = 4,748.36 : x
  2. Step 2: Convert to fraction form
    7,678.96/11,500.12 = 4,748.36/x
  3. Step 3: Cross multiply
    7,678.96x = 11,500.12 × 4,748.36
  4. Step 4: Simplify right side
    7,678.96x = 54,606,709.80
  5. Step 5: Solve for x
    x = 54,606,709.80/7,678.96
  6. Step 6: Final answer
    x = 7,111.21

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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.