Home / 31,824.69-43,930.31-21,210.45

Finding the Fourth Proportional to 31,824.69, 43,930.31 and 21,210.45

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Solution

The fourth proportional to 31,824.69, 43,930.31 and 21,210.45 is: 29,278.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,824.69 : 43,930.31 = 21,210.45 : x
  2. Step 2: Convert to fraction form
    31,824.69/43,930.31 = 21,210.45/x
  3. Step 3: Cross multiply
    31,824.69x = 43,930.31 × 21,210.45
  4. Step 4: Simplify right side
    31,824.69x = 931,781,643.74
  5. Step 5: Solve for x
    x = 931,781,643.74/31,824.69
  6. Step 6: Final answer
    x = 29,278.58

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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.