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Finding the Fourth Proportional to 8,740.84, 13,012.42 and 8,688.96

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Solution

The fourth proportional to 8,740.84, 13,012.42 and 8,688.96 is: 12,935.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,740.84 : 13,012.42 = 8,688.96 : x
  2. Step 2: Convert to fraction form
    8,740.84/13,012.42 = 8,688.96/x
  3. Step 3: Cross multiply
    8,740.84x = 13,012.42 × 8,688.96
  4. Step 4: Simplify right side
    8,740.84x = 113,064,396.88
  5. Step 5: Solve for x
    x = 113,064,396.88/8,740.84
  6. Step 6: Final answer
    x = 12,935.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.