Home / 31,628.04-43,657.56-21,020.28

Finding the Fourth Proportional to 31,628.04, 43,657.56 and 21,020.28

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Solution

The fourth proportional to 31,628.04, 43,657.56 and 21,020.28 is: 29,015.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,628.04 : 43,657.56 = 21,020.28 : x
  2. Step 2: Convert to fraction form
    31,628.04/43,657.56 = 21,020.28/x
  3. Step 3: Cross multiply
    31,628.04x = 43,657.56 × 21,020.28
  4. Step 4: Simplify right side
    31,628.04x = 917,694,135.32
  5. Step 5: Solve for x
    x = 917,694,135.32/31,628.04
  6. Step 6: Final answer
    x = 29,015.21

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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.