Home / 31,317.12-43,208.64-20,702.88

Finding the Fourth Proportional to 31,317.12, 43,208.64 and 20,702.88

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Solution

The fourth proportional to 31,317.12, 43,208.64 and 20,702.88 is: 28,564.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,317.12 : 43,208.64 = 20,702.88 : x
  2. Step 2: Convert to fraction form
    31,317.12/43,208.64 = 20,702.88/x
  3. Step 3: Cross multiply
    31,317.12x = 43,208.64 × 20,702.88
  4. Step 4: Simplify right side
    31,317.12x = 894,543,288.88
  5. Step 5: Solve for x
    x = 894,543,288.88/31,317.12
  6. Step 6: Final answer
    x = 28,564.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.