Home / 8,688.84-13,029.81-3,139.18

Finding the Fourth Proportional to 8,688.84, 13,029.81 and 3,139.18

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Solution

The fourth proportional to 8,688.84, 13,029.81 and 3,139.18 is: 4,707.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,688.84 : 13,029.81 = 3,139.18 : x
  2. Step 2: Convert to fraction form
    8,688.84/13,029.81 = 3,139.18/x
  3. Step 3: Cross multiply
    8,688.84x = 13,029.81 × 3,139.18
  4. Step 4: Simplify right side
    8,688.84x = 40,902,918.96
  5. Step 5: Solve for x
    x = 40,902,918.96/8,688.84
  6. Step 6: Final answer
    x = 4,707.52

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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.