Home / 31,490.13-47,220.83-13,720.06

Finding the Fourth Proportional to 31,490.13, 47,220.83 and 13,720.06

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Solution

The fourth proportional to 31,490.13, 47,220.83 and 13,720.06 is: 20,573.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,490.13 : 47,220.83 = 13,720.06 : x
  2. Step 2: Convert to fraction form
    31,490.13/47,220.83 = 13,720.06/x
  3. Step 3: Cross multiply
    31,490.13x = 47,220.83 × 13,720.06
  4. Step 4: Simplify right side
    31,490.13x = 647,872,620.85
  5. Step 5: Solve for x
    x = 647,872,620.85/31,490.13
  6. Step 6: Final answer
    x = 20,573.83

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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.