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Finding the Fourth Proportional to 15,045.78, 20,765.52 and 8,585.43

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Solution

The fourth proportional to 15,045.78, 20,765.52 and 8,585.43 is: 11,849.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,045.78 : 20,765.52 = 8,585.43 : x
  2. Step 2: Convert to fraction form
    15,045.78/20,765.52 = 8,585.43/x
  3. Step 3: Cross multiply
    15,045.78x = 20,765.52 × 8,585.43
  4. Step 4: Simplify right side
    15,045.78x = 178,280,918.37
  5. Step 5: Solve for x
    x = 178,280,918.37/15,045.78
  6. Step 6: Final answer
    x = 11,849.23

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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.