Home / 7,678.90-11,518.53-2,748.88

Finding the Fourth Proportional to 7,678.90, 11,518.53 and 2,748.88

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Solution

The fourth proportional to 7,678.90, 11,518.53 and 2,748.88 is: 4,123.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,678.90 : 11,518.53 = 2,748.88 : x
  2. Step 2: Convert to fraction form
    7,678.90/11,518.53 = 2,748.88/x
  3. Step 3: Cross multiply
    7,678.90x = 11,518.53 × 2,748.88
  4. Step 4: Simplify right side
    7,678.90x = 31,663,056.75
  5. Step 5: Solve for x
    x = 31,663,056.75/7,678.90
  6. Step 6: Final answer
    x = 4,123.38

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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.