Home / 31,405.12-47,095.62-12,678.64

Finding the Fourth Proportional to 31,405.12, 47,095.62 and 12,678.64

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Solution

The fourth proportional to 31,405.12, 47,095.62 and 12,678.64 is: 19,013.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,405.12 : 47,095.62 = 12,678.64 : x
  2. Step 2: Convert to fraction form
    31,405.12/47,095.62 = 12,678.64/x
  3. Step 3: Cross multiply
    31,405.12x = 47,095.62 × 12,678.64
  4. Step 4: Simplify right side
    31,405.12x = 597,108,411.56
  5. Step 5: Solve for x
    x = 597,108,411.56/31,405.12
  6. Step 6: Final answer
    x = 19,013.09

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.