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Finding the Fourth Proportional to 8,689.05, 13,039.07 and 4,998.51

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Solution

The fourth proportional to 8,689.05, 13,039.07 and 4,998.51 is: 7,500.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,689.05 : 13,039.07 = 4,998.51 : x
  2. Step 2: Convert to fraction form
    8,689.05/13,039.07 = 4,998.51/x
  3. Step 3: Cross multiply
    8,689.05x = 13,039.07 × 4,998.51
  4. Step 4: Simplify right side
    8,689.05x = 65,175,896.79
  5. Step 5: Solve for x
    x = 65,175,896.79/8,689.05
  6. Step 6: Final answer
    x = 7,500.92

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Half scale
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Double scale
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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.