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Finding the Fourth Proportional to 8,477.82, 12,705.75 and 7,315.11

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Solution

The fourth proportional to 8,477.82, 12,705.75 and 7,315.11 is: 10,963.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,477.82 : 12,705.75 = 7,315.11 : x
  2. Step 2: Convert to fraction form
    8,477.82/12,705.75 = 7,315.11/x
  3. Step 3: Cross multiply
    8,477.82x = 12,705.75 × 7,315.11
  4. Step 4: Simplify right side
    8,477.82x = 92,943,958.88
  5. Step 5: Solve for x
    x = 92,943,958.88/8,477.82
  6. Step 6: Final answer
    x = 10,963.19

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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.