Home / 31,579.28-43,581-20,950.80

Finding the Fourth Proportional to 31,579.28, 43,581 and 20,950.80

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Solution

The fourth proportional to 31,579.28, 43,581 and 20,950.80 is: 28,913.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,579.28 : 43,581 = 20,950.80 : x
  2. Step 2: Convert to fraction form
    31,579.28/43,581 = 20,950.80/x
  3. Step 3: Cross multiply
    31,579.28x = 43,581 × 20,950.80
  4. Step 4: Simplify right side
    31,579.28x = 913,056,814.80
  5. Step 5: Solve for x
    x = 913,056,814.80/31,579.28
  6. Step 6: Final answer
    x = 28,913.16

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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.