Home / 31,305.60-43,218.36-21,287.52

Finding the Fourth Proportional to 31,305.60, 43,218.36 and 21,287.52

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Solution

The fourth proportional to 31,305.60, 43,218.36 and 21,287.52 is: 29,388.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,305.60 : 43,218.36 = 21,287.52 : x
  2. Step 2: Convert to fraction form
    31,305.60/43,218.36 = 21,287.52/x
  3. Step 3: Cross multiply
    31,305.60x = 43,218.36 × 21,287.52
  4. Step 4: Simplify right side
    31,305.60x = 920,011,702.87
  5. Step 5: Solve for x
    x = 920,011,702.87/31,305.60
  6. Step 6: Final answer
    x = 29,388.09

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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.