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Finding the Fourth Proportional to 15,107.67, 20,851.08 and 12,585.78

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Solution

The fourth proportional to 15,107.67, 20,851.08 and 12,585.78 is: 17,370.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,107.67 : 20,851.08 = 12,585.78 : x
  2. Step 2: Convert to fraction form
    15,107.67/20,851.08 = 12,585.78/x
  3. Step 3: Cross multiply
    15,107.67x = 20,851.08 × 12,585.78
  4. Step 4: Simplify right side
    15,107.67x = 262,427,105.64
  5. Step 5: Solve for x
    x = 262,427,105.64/15,107.67
  6. Step 6: Final answer
    x = 17,370.46

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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.