Home / 31,394.76-47,105.13-12,688.02

Finding the Fourth Proportional to 31,394.76, 47,105.13 and 12,688.02

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Solution

The fourth proportional to 31,394.76, 47,105.13 and 12,688.02 is: 19,037.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,394.76 : 47,105.13 = 12,688.02 : x
  2. Step 2: Convert to fraction form
    31,394.76/47,105.13 = 12,688.02/x
  3. Step 3: Cross multiply
    31,394.76x = 47,105.13 × 12,688.02
  4. Step 4: Simplify right side
    31,394.76x = 597,670,831.54
  5. Step 5: Solve for x
    x = 597,670,831.54/31,394.76
  6. Step 6: Final answer
    x = 19,037.28

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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.