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Finding the Fourth Proportional to 31,485.62, 47,227.44 and 12,760.62

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Solution

The fourth proportional to 31,485.62, 47,227.44 and 12,760.62 is: 19,140.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,485.62 : 47,227.44 = 12,760.62 : x
  2. Step 2: Convert to fraction form
    31,485.62/47,227.44 = 12,760.62/x
  3. Step 3: Cross multiply
    31,485.62x = 47,227.44 × 12,760.62
  4. Step 4: Simplify right side
    31,485.62x = 602,651,415.41
  5. Step 5: Solve for x
    x = 602,651,415.41/31,485.62
  6. Step 6: Final answer
    x = 19,140.53

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1.5x scale

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.