Home / 31,386.57-47,079.78-19,707.99

Finding the Fourth Proportional to 31,386.57, 47,079.78 and 19,707.99

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Solution

The fourth proportional to 31,386.57, 47,079.78 and 19,707.99 is: 29,561.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,386.57 : 47,079.78 = 19,707.99 : x
  2. Step 2: Convert to fraction form
    31,386.57/47,079.78 = 19,707.99/x
  3. Step 3: Cross multiply
    31,386.57x = 47,079.78 × 19,707.99
  4. Step 4: Simplify right side
    31,386.57x = 927,847,833.44
  5. Step 5: Solve for x
    x = 927,847,833.44/31,386.57
  6. Step 6: Final answer
    x = 29,561.94

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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.