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Finding the Fourth Proportional to 8,959.95, 13,438.13 and 8,515.38

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Solution

The fourth proportional to 8,959.95, 13,438.13 and 8,515.38 is: 12,771.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,959.95 : 13,438.13 = 8,515.38 : x
  2. Step 2: Convert to fraction form
    8,959.95/13,438.13 = 8,515.38/x
  3. Step 3: Cross multiply
    8,959.95x = 13,438.13 × 8,515.38
  4. Step 4: Simplify right side
    8,959.95x = 114,430,739.62
  5. Step 5: Solve for x
    x = 114,430,739.62/8,959.95
  6. Step 6: Final answer
    x = 12,771.35

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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.