Home / 13,136.60-18,128.04-7,831.32

Finding the Fourth Proportional to 13,136.60, 18,128.04 and 7,831.32

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Solution

The fourth proportional to 13,136.60, 18,128.04 and 7,831.32 is: 10,806.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,136.60 : 18,128.04 = 7,831.32 : x
  2. Step 2: Convert to fraction form
    13,136.60/18,128.04 = 7,831.32/x
  3. Step 3: Cross multiply
    13,136.60x = 18,128.04 × 7,831.32
  4. Step 4: Simplify right side
    13,136.60x = 141,966,482.21
  5. Step 5: Solve for x
    x = 141,966,482.21/13,136.60
  6. Step 6: Final answer
    x = 10,806.94

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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.