Home / 31,439.10-43,356.30-20,664.94

Finding the Fourth Proportional to 31,439.10, 43,356.30 and 20,664.94

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Solution

The fourth proportional to 31,439.10, 43,356.30 and 20,664.94 is: 28,498.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,439.10 : 43,356.30 = 20,664.94 : x
  2. Step 2: Convert to fraction form
    31,439.10/43,356.30 = 20,664.94/x
  3. Step 3: Cross multiply
    31,439.10x = 43,356.30 × 20,664.94
  4. Step 4: Simplify right side
    31,439.10x = 895,955,338.12
  5. Step 5: Solve for x
    x = 895,955,338.12/31,439.10
  6. Step 6: Final answer
    x = 28,498.12

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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.