Home / 18,774.06-28,156.23-7,678.68

Finding the Fourth Proportional to 18,774.06, 28,156.23 and 7,678.68

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Solution

The fourth proportional to 18,774.06, 28,156.23 and 7,678.68 is: 11,516.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,774.06 : 28,156.23 = 7,678.68 : x
  2. Step 2: Convert to fraction form
    18,774.06/28,156.23 = 7,678.68/x
  3. Step 3: Cross multiply
    18,774.06x = 28,156.23 × 7,678.68
  4. Step 4: Simplify right side
    18,774.06x = 216,202,680.18
  5. Step 5: Solve for x
    x = 216,202,680.18/18,774.06
  6. Step 6: Final answer
    x = 11,516.03

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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.