Home / 31,541.19-47,311.79-12,831.40

Finding the Fourth Proportional to 31,541.19, 47,311.79 and 12,831.40

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Solution

The fourth proportional to 31,541.19, 47,311.79 and 12,831.40 is: 19,247.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,541.19 : 47,311.79 = 12,831.40 : x
  2. Step 2: Convert to fraction form
    31,541.19/47,311.79 = 12,831.40/x
  3. Step 3: Cross multiply
    31,541.19x = 47,311.79 × 12,831.40
  4. Step 4: Simplify right side
    31,541.19x = 607,076,668.60
  5. Step 5: Solve for x
    x = 607,076,668.60/31,541.19
  6. Step 6: Final answer
    x = 19,247.11

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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.