Home / 31,669.20-47,485.80-11,948.40

Finding the Fourth Proportional to 31,669.20, 47,485.80 and 11,948.40

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Solution

The fourth proportional to 31,669.20, 47,485.80 and 11,948.40 is: 17,915.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,669.20 : 47,485.80 = 11,948.40 : x
  2. Step 2: Convert to fraction form
    31,669.20/47,485.80 = 11,948.40/x
  3. Step 3: Cross multiply
    31,669.20x = 47,485.80 × 11,948.40
  4. Step 4: Simplify right side
    31,669.20x = 567,379,332.72
  5. Step 5: Solve for x
    x = 567,379,332.72/31,669.20
  6. Step 6: Final answer
    x = 17,915.81

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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.