Home / 20,787.93-31,162.46-7,636.77

Finding the Fourth Proportional to 20,787.93, 31,162.46 and 7,636.77

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Solution

The fourth proportional to 20,787.93, 31,162.46 and 7,636.77 is: 11,448.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,787.93 : 31,162.46 = 7,636.77 : x
  2. Step 2: Convert to fraction form
    20,787.93/31,162.46 = 7,636.77/x
  3. Step 3: Cross multiply
    20,787.93x = 31,162.46 × 7,636.77
  4. Step 4: Simplify right side
    20,787.93x = 237,980,501.47
  5. Step 5: Solve for x
    x = 237,980,501.47/20,787.93
  6. Step 6: Final answer
    x = 11,448.01

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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.