Home / 31,698.30-47,520.69-19,985.70

Finding the Fourth Proportional to 31,698.30, 47,520.69 and 19,985.70

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Solution

The fourth proportional to 31,698.30, 47,520.69 and 19,985.70 is: 29,961.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,698.30 : 47,520.69 = 19,985.70 : x
  2. Step 2: Convert to fraction form
    31,698.30/47,520.69 = 19,985.70/x
  3. Step 3: Cross multiply
    31,698.30x = 47,520.69 × 19,985.70
  4. Step 4: Simplify right side
    31,698.30x = 949,734,254.13
  5. Step 5: Solve for x
    x = 949,734,254.13/31,698.30
  6. Step 6: Final answer
    x = 29,961.68

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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.