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Finding the Fourth Proportional to 31,336.80, 47,005.20 and 19,509.60

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Solution

The fourth proportional to 31,336.80, 47,005.20 and 19,509.60 is: 29,264.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,336.80 : 47,005.20 = 19,509.60 : x
  2. Step 2: Convert to fraction form
    31,336.80/47,005.20 = 19,509.60/x
  3. Step 3: Cross multiply
    31,336.80x = 47,005.20 × 19,509.60
  4. Step 4: Simplify right side
    31,336.80x = 917,052,649.92
  5. Step 5: Solve for x
    x = 917,052,649.92/31,336.80
  6. Step 6: Final answer
    x = 29,264.40

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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.