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Finding the Fourth Proportional to 8,687.85, 13,025.60 and 7,040.77

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Solution

The fourth proportional to 8,687.85, 13,025.60 and 7,040.77 is: 10,556.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,687.85 : 13,025.60 = 7,040.77 : x
  2. Step 2: Convert to fraction form
    8,687.85/13,025.60 = 7,040.77/x
  3. Step 3: Cross multiply
    8,687.85x = 13,025.60 × 7,040.77
  4. Step 4: Simplify right side
    8,687.85x = 91,710,253.71
  5. Step 5: Solve for x
    x = 91,710,253.71/8,687.85
  6. Step 6: Final answer
    x = 10,556.15

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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.