Home / 12,931.25-19,388.77-9,831.38

Finding the Fourth Proportional to 12,931.25, 19,388.77 and 9,831.38

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Solution

The fourth proportional to 12,931.25, 19,388.77 and 9,831.38 is: 14,740.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,931.25 : 19,388.77 = 9,831.38 : x
  2. Step 2: Convert to fraction form
    12,931.25/19,388.77 = 9,831.38/x
  3. Step 3: Cross multiply
    12,931.25x = 19,388.77 × 9,831.38
  4. Step 4: Simplify right side
    12,931.25x = 190,618,244.08
  5. Step 5: Solve for x
    x = 190,618,244.08/12,931.25
  6. Step 6: Final answer
    x = 14,740.90

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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.