Home / 31,409.23-47,116.15-11,687.78

Finding the Fourth Proportional to 31,409.23, 47,116.15 and 11,687.78

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Solution

The fourth proportional to 31,409.23, 47,116.15 and 11,687.78 is: 17,532.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,409.23 : 47,116.15 = 11,687.78 : x
  2. Step 2: Convert to fraction form
    31,409.23/47,116.15 = 11,687.78/x
  3. Step 3: Cross multiply
    31,409.23x = 47,116.15 × 11,687.78
  4. Step 4: Simplify right side
    31,409.23x = 550,683,137.21
  5. Step 5: Solve for x
    x = 550,683,137.21/31,409.23
  6. Step 6: Final answer
    x = 17,532.53

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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.