Home / 31,831.20-47,746.56-8,459.28

Finding the Fourth Proportional to 31,831.20, 47,746.56 and 8,459.28

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Solution

The fourth proportional to 31,831.20, 47,746.56 and 8,459.28 is: 12,688.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,831.20 : 47,746.56 = 8,459.28 : x
  2. Step 2: Convert to fraction form
    31,831.20/47,746.56 = 8,459.28/x
  3. Step 3: Cross multiply
    31,831.20x = 47,746.56 × 8,459.28
  4. Step 4: Simplify right side
    31,831.20x = 403,901,520.08
  5. Step 5: Solve for x
    x = 403,901,520.08/31,831.20
  6. Step 6: Final answer
    x = 12,688.86

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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.