Home / 13,136-18,125.20-7,831.31

Finding the Fourth Proportional to 13,136, 18,125.20 and 7,831.31

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Solution

The fourth proportional to 13,136, 18,125.20 and 7,831.31 is: 10,805.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,136 : 18,125.20 = 7,831.31 : x
  2. Step 2: Convert to fraction form
    13,136/18,125.20 = 7,831.31/x
  3. Step 3: Cross multiply
    13,136x = 18,125.20 × 7,831.31
  4. Step 4: Simplify right side
    13,136x = 141,944,060.01
  5. Step 5: Solve for x
    x = 141,944,060.01/13,136
  6. Step 6: Final answer
    x = 10,805.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.