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Finding the Fourth Proportional to 8,707.53, 12,015.23 and 5,561.49

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Solution

The fourth proportional to 8,707.53, 12,015.23 and 5,561.49 is: 7,674.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,707.53 : 12,015.23 = 5,561.49 : x
  2. Step 2: Convert to fraction form
    8,707.53/12,015.23 = 5,561.49/x
  3. Step 3: Cross multiply
    8,707.53x = 12,015.23 × 5,561.49
  4. Step 4: Simplify right side
    8,707.53x = 66,822,553.69
  5. Step 5: Solve for x
    x = 66,822,553.69/8,707.53
  6. Step 6: Final answer
    x = 7,674.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.