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Finding the Fourth Proportional to 8,605.82, 12,909.15 and 2,686.74

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Solution

The fourth proportional to 8,605.82, 12,909.15 and 2,686.74 is: 4,030.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,605.82 : 12,909.15 = 2,686.74 : x
  2. Step 2: Convert to fraction form
    8,605.82/12,909.15 = 2,686.74/x
  3. Step 3: Cross multiply
    8,605.82x = 12,909.15 × 2,686.74
  4. Step 4: Simplify right side
    8,605.82x = 34,683,529.67
  5. Step 5: Solve for x
    x = 34,683,529.67/8,605.82
  6. Step 6: Final answer
    x = 4,030.24

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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.