Home / 31,615.98-43,579.38-21,403.80

Finding the Fourth Proportional to 31,615.98, 43,579.38 and 21,403.80

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Solution

The fourth proportional to 31,615.98, 43,579.38 and 21,403.80 is: 29,502.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,615.98 : 43,579.38 = 21,403.80 : x
  2. Step 2: Convert to fraction form
    31,615.98/43,579.38 = 21,403.80/x
  3. Step 3: Cross multiply
    31,615.98x = 43,579.38 × 21,403.80
  4. Step 4: Simplify right side
    31,615.98x = 932,764,250.49
  5. Step 5: Solve for x
    x = 932,764,250.49/31,615.98
  6. Step 6: Final answer
    x = 29,502.93

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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.