Home / 31,698.91-43,734.63-21,090.34

Finding the Fourth Proportional to 31,698.91, 43,734.63 and 21,090.34

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Solution

The fourth proportional to 31,698.91, 43,734.63 and 21,090.34 is: 29,098.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,698.91 : 43,734.63 = 21,090.34 : x
  2. Step 2: Convert to fraction form
    31,698.91/43,734.63 = 21,090.34/x
  3. Step 3: Cross multiply
    31,698.91x = 43,734.63 × 21,090.34
  4. Step 4: Simplify right side
    31,698.91x = 922,378,216.47
  5. Step 5: Solve for x
    x = 922,378,216.47/31,698.91
  6. Step 6: Final answer
    x = 29,098.11

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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.